28815392 has 12 divisors (see below), whose sum is σ = 56730366. Its totient is φ = 14407680.

The previous prime is 28815379. The next prime is 28815403. The reversal of 28815392 is 29351882.

It can be written as a sum of positive squares in only one way, i.e., 24167056 + 4648336 = 4916^2 + 2156^2 .

It is a super-2 number, since 2×28815392² = 1660653632227328, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 450209 + ... + 450272.

Almost surely, 2^28815392 is an apocalyptic number.

It is an amenable number.

28815392 is a deficient number, since it is larger than the sum of its proper divisors (27914974).

28815392 is an equidigital number, since it uses as much as digits as its factorization.

28815392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 900491 (or 900483 counting only the distinct ones).

The product of its digits is 34560, while the sum is 38.

The square root of 28815392 is about 5367.9970193732. The cubic root of 28815392 is about 306.5783698748.

The spelling of 28815392 in words is "twenty-eight million, eight hundred fifteen thousand, three hundred ninety-two".