28556732 has 12 divisors (see below), whose sum is σ = 50251656. Its totient is φ = 14199120.

The previous prime is 28556729. The next prime is 28556741. The reversal of 28556732 is 23765582.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18998 + ... + 20445.

It is an arithmetic number, because the mean of its divisors is an integer number (4187638).

Almost surely, 2^28556732 is an apocalyptic number.

It is an amenable number.

28556732 is a deficient number, since it is larger than the sum of its proper divisors (21694924).

28556732 is a wasteful number, since it uses less digits than its factorization.

28556732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39628 (or 39626 counting only the distinct ones).

The product of its digits is 100800, while the sum is 38.

The square root of 28556732 is about 5343.8499230424. The cubic root of 28556732 is about 305.6582825847.

The spelling of 28556732 in words is "twenty-eight million, five hundred fifty-six thousand, seven hundred thirty-two".