28650631 has 2 divisors, whose sum is σ = 28650632. Its totient is φ = 28650630.

The previous prime is 28650563. The next prime is 28650653. The reversal of 28650631 is 13605682.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28650631 - 2¹⁵ = 28617863 is a prime.

It is a super-2 number, since 2×28650631² = 1641717313396322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28650593 and 28650602.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28650131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14325315 + 14325316.

It is an arithmetic number, because the mean of its divisors is an integer number (14325316).

Almost surely, 2^28650631 is an apocalyptic number.

28650631 is a deficient number, since it is larger than the sum of its proper divisors (1).

28650631 is an equidigital number, since it uses as much as digits as its factorization.

28650631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 28650631 is about 5352.6284197579. The cubic root of 28650631 is about 305.9929334663.

The spelling of 28650631 in words is "twenty-eight million, six hundred fifty thousand, six hundred thirty-one".