28517536 has 12 divisors (see below), whose sum is σ = 56143962. Its totient is φ = 14258752.

The previous prime is 28517519. The next prime is 28517543. The reversal of 28517536 is 63571582.

It can be written as a sum of positive squares in only one way, i.e., 28515600 + 1936 = 5340^2 + 44^2 .

It is a super-2 number, since 2×28517536² = 1626499719022592, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28517495 and 28517504.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 445555 + ... + 445618.

Almost surely, 2^28517536 is an apocalyptic number.

It is an amenable number.

28517536 is a deficient number, since it is larger than the sum of its proper divisors (27626426).

28517536 is an equidigital number, since it uses as much as digits as its factorization.

28517536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 891183 (or 891175 counting only the distinct ones).

The product of its digits is 50400, while the sum is 37.

The square root of 28517536 is about 5340.1812703316. The cubic root of 28517536 is about 305.5183731627.

The spelling of 28517536 in words is "twenty-eight million, five hundred seventeen thousand, five hundred thirty-six".