28564336 has 20 divisors (see below), whose sum is σ = 55612264. Its totient is φ = 14212800.

The previous prime is 28564313. The next prime is 28564337. The reversal of 28564336 is 63346582.

It is a super-2 number, since 2×28564336² = 1631842582241792, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28564295 and 28564304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28564337) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 855 + ... + 7606.

Almost surely, 2^28564336 is an apocalyptic number.

It is an amenable number.

28564336 is a deficient number, since it is larger than the sum of its proper divisors (27047928).

28564336 is a wasteful number, since it uses less digits than its factorization.

28564336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8680 (or 8674 counting only the distinct ones).

The product of its digits is 103680, while the sum is 37.

The square root of 28564336 is about 5344.5613477628. The cubic root of 28564336 is about 305.6854100973.

It can be divided in two parts, 28564 and 336, that added together give a square (28900 = 170²).

The spelling of 28564336 in words is "twenty-eight million, five hundred sixty-four thousand, three hundred thirty-six".