28617756 has 12 divisors (see below), whose sum is σ = 66774792. Its totient is φ = 9539248.

The previous prime is 28617733. The next prime is 28617763. The reversal of 28617756 is 65771682.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1192395 + ... + 1192418.

It is an arithmetic number, because the mean of its divisors is an integer number (5564566).

Almost surely, 2^28617756 is an apocalyptic number.

It is an amenable number.

28617756 is an abundant number, since it is smaller than the sum of its proper divisors (38157036).

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

28617756 is a wasteful number, since it uses less digits than its factorization.

28617756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2384820 (or 2384818 counting only the distinct ones).

The product of its digits is 141120, while the sum is 42.

The square root of 28617756 is about 5349.5566171413. The cubic root of 28617756 is about 305.8758520692.

The spelling of 28617756 in words is "twenty-eight million, six hundred seventeen thousand, seven hundred fifty-six".