28725164 has 24 divisors (see below), whose sum is σ = 54484080. Its totient is φ = 13172544.

The previous prime is 28725149. The next prime is 28725181. The reversal of 28725164 is 46152782.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6782 + ... + 10170.

It is an arithmetic number, because the mean of its divisors is an integer number (2270170).

Almost surely, 2^28725164 is an apocalyptic number.

It is an amenable number.

28725164 is a deficient number, since it is larger than the sum of its proper divisors (25758916).

28725164 is a wasteful number, since it uses less digits than its factorization.

28725164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3569 (or 3567 counting only the distinct ones).

The product of its digits is 26880, while the sum is 35.

The square root of 28725164 is about 5359.5861780552. The cubic root of 28725164 is about 306.2580448255.

The spelling of 28725164 in words is "twenty-eight million, seven hundred twenty-five thousand, one hundred sixty-four".