28715824 has 20 divisors (see below), whose sum is σ = 56688336. Its totient is φ = 14086592.

The previous prime is 28715807. The next prime is 28715833. The reversal of 28715824 is 42851782.

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, 16084 + ... + 17779.

Almost surely, 2^28715824 is an apocalyptic number.

It is an amenable number.

28715824 is a deficient number, since it is larger than the sum of its proper divisors (27972512).

28715824 is a wasteful number, since it uses less digits than its factorization.

28715824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33924 (or 33918 counting only the distinct ones).

The product of its digits is 35840, while the sum is 37.

The square root of 28715824 is about 5358.7147712861. The cubic root of 28715824 is about 306.2248479135.

The spelling of 28715824 in words is "twenty-eight million, seven hundred fifteen thousand, eight hundred twenty-four".