28738624 has 28 divisors (see below), whose sum is σ = 57351168. Its totient is φ = 14288000.

The previous prime is 28738607. The next prime is 28738631. The reversal of 28738624 is 42683782.

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, 11049 + ... + 13399.

It is an arithmetic number, because the mean of its divisors is an integer number (2048256).

Almost surely, 2^28738624 is an apocalyptic number.

It is an amenable number.

28738624 is a deficient number, since it is larger than the sum of its proper divisors (28612544).

28738624 is a wasteful number, since it uses less digits than its factorization.

28738624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2554 (or 2544 counting only the distinct ones).

The product of its digits is 129024, while the sum is 40.

The square root of 28738624 is about 5360.8417249533. The cubic root of 28738624 is about 306.3058726880.

The spelling of 28738624 in words is "twenty-eight million, seven hundred thirty-eight thousand, six hundred twenty-four".