28565392 has 10 divisors (see below), whose sum is σ = 55345478. Its totient is φ = 14282688.

The previous prime is 28565371. The next prime is 28565399. The reversal of 28565392 is 29356582.

It can be written as a sum of positive squares in only one way, i.e., 28558336 + 7056 = 5344^2 + 84^2 .

It is a super-2 number, since 2×28565392² = 1631963240227328, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28565399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 892653 + ... + 892684.

Almost surely, 2^28565392 is an apocalyptic number.

It is an amenable number.

28565392 is a deficient number, since it is larger than the sum of its proper divisors (26780086).

28565392 is a wasteful number, since it uses less digits than its factorization.

28565392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1785345 (or 1785339 counting only the distinct ones).

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

The square root of 28565392 is about 5344.6601388676. The cubic root of 28565392 is about 305.6891770302.

The spelling of 28565392 in words is "twenty-eight million, five hundred sixty-five thousand, three hundred ninety-two".