28884724 has 12 divisors (see below), whose sum is σ = 55143648. Its totient is φ = 13129400.

The previous prime is 28884719. The next prime is 28884733. The reversal of 28884724 is 42748882.

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, 328192 + ... + 328279.

It is an arithmetic number, because the mean of its divisors is an integer number (4595304).

Almost surely, 2^28884724 is an apocalyptic number.

It is an amenable number.

28884724 is a deficient number, since it is larger than the sum of its proper divisors (26258924).

28884724 is a wasteful number, since it uses less digits than its factorization.

28884724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 656486 (or 656484 counting only the distinct ones).

The product of its digits is 229376, while the sum is 43.

The square root of 28884724 is about 5374.4510417344. The cubic root of 28884724 is about 306.8240564705.

The spelling of 28884724 in words is "twenty-eight million, eight hundred eighty-four thousand, seven hundred twenty-four".