428
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Number
$428$ (four hundred and twenty-eight) is:
- $2^2 \times 107$
- The $2$nd integer after $91$ whose square has a decimal representation consisting of the concatenation of $2$ consecutive integers:
- $428^2 = 183 \, 184$
- The $1$st integer whose square has a decimal representation consisting of the concatenation of $2$ consecutive increasing integers:
- $428^2 = 183 \, 184$
Also see
- Previous ... Next: Numbers whose Squares have Digits which form Consecutive Integers
- Next: Numbers whose Squares have Digits which form Consecutive Increasing Integers
Sources
- 1986: David Wells: Curious and Interesting Numbers ... (previous) ... (next): $183,184$
- 1997: David Wells: Curious and Interesting Numbers (2nd ed.) ... (previous) ... (next): $183,184$