28732624 has 20 divisors (see below), whose sum is σ = 55754244. Its totient is φ = 14344448.

The previous prime is 28732621. The next prime is 28732631. The reversal of 28732624 is 42623782.

It can be written as a sum of positive squares in 2 ways, for example, as 3732624 + 25000000 = 1932^2 + 5000^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28732624.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28732621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16734 + ... + 18370.

Almost surely, 2^28732624 is an apocalyptic number.

It is an amenable number.

28732624 is a deficient number, since it is larger than the sum of its proper divisors (27021620).

28732624 is a wasteful number, since it uses less digits than its factorization.

28732624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2742 (or 2736 counting only the distinct ones).

The product of its digits is 32256, while the sum is 34.

The square root of 28732624 is about 5360.2820821296. The cubic root of 28732624 is about 306.2845545350.

The spelling of 28732624 in words is "twenty-eight million, seven hundred thirty-two thousand, six hundred twenty-four".