28502972 has 6 divisors (see below), whose sum is σ = 49880208. Its totient is φ = 14251484.

The previous prime is 28502941. The next prime is 28502989. The reversal of 28502972 is 27920582.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3562868 + ... + 3562875.

It is an arithmetic number, because the mean of its divisors is an integer number (8313368).

Almost surely, 2^28502972 is an apocalyptic number.

It is an amenable number.

28502972 is a deficient number, since it is larger than the sum of its proper divisors (21377236).

28502972 is a wasteful number, since it uses less digits than its factorization.

28502972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7125747 (or 7125745 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 28502972 is about 5338.8174720625. The cubic root of 28502972 is about 305.4663545583.

The spelling of 28502972 in words is "twenty-eight million, five hundred two thousand, nine hundred seventy-two".