28655392 has 24 divisors (see below), whose sum is σ = 57793932. Its totient is φ = 13977600.

The previous prime is 28655371. The next prime is 28655399. The reversal of 28655392 is 29355682.

It can be written as a sum of positive squares in 2 ways, for example, as 17606416 + 11048976 = 4196^2 + 3324^2 .

It is a super-2 number, since 2×28655392² = 1642262981347328, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28655399) 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 in 3 ways as a sum of consecutive naturals, for example, 9609 + ... + 12232.

Almost surely, 2^28655392 is an apocalyptic number.

It is an amenable number.

28655392 is an abundant number, since it is smaller than the sum of its proper divisors (29138540).

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

28655392 is a wasteful number, since it uses less digits than its factorization.

28655392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21892 (or 21884 counting only the distinct ones).

The product of its digits is 129600, while the sum is 40.

The square root of 28655392 is about 5353.0731360593. The cubic root of 28655392 is about 306.0098819199.

The spelling of 28655392 in words is "twenty-eight million, six hundred fifty-five thousand, three hundred ninety-two".