28657392 has 40 divisors (see below), whose sum is σ = 76423680. Its totient is φ = 9243840.

The previous prime is 28657331. The next prime is 28657439. The reversal of 28657392 is 29375682.

It is a super-2 number, since 2×28657392² = 1642492232483328, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 8142 + ... + 11117.

It is an arithmetic number, because the mean of its divisors is an integer number (1910592).

Almost surely, 2^28657392 is an apocalyptic number.

It is an amenable number.

28657392 is an abundant number, since it is smaller than the sum of its proper divisors (47766288).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28657392 is a wasteful number, since it uses less digits than its factorization.

28657392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19301 (or 19295 counting only the distinct ones).

The product of its digits is 181440, while the sum is 42.

The square root of 28657392 is about 5353.2599413815. The cubic root of 28657392 is about 306.0170010632.

The spelling of 28657392 in words is "twenty-eight million, six hundred fifty-seven thousand, three hundred ninety-two".