15428831 has 12 divisors (see below), whose sum is σ = 17326176. Its totient is φ = 13722720.

The previous prime is 15428813. The next prime is 15428839. The reversal of 15428831 is 13882451.

It is not a de Polignac number, because 15428831 - 2⁶ = 15428767 is a prime.

It is a super-2 number, since 2×15428831² = 476097652053122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15428839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4331 + ... + 7043.

It is an arithmetic number, because the mean of its divisors is an integer number (1443848).

Almost surely, 2^15428831 is an apocalyptic number.

15428831 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

15428831 is a deficient number, since it is larger than the sum of its proper divisors (1897345).

15428831 is a wasteful number, since it uses less digits than its factorization.

15428831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2782 (or 2771 counting only the distinct ones).

The product of its digits is 7680, while the sum is 32.

The square root of 15428831 is about 3927.9550659344. The cubic root of 15428831 is about 248.9493561084.

The spelling of 15428831 in words is "fifteen million, four hundred twenty-eight thousand, eight hundred thirty-one".