28164904 has 8 divisors (see below), whose sum is σ = 52809210. Its totient is φ = 14082448.

The previous prime is 28164883. The next prime is 28164953. The reversal of 28164904 is 40946182.

It can be written as a sum of positive squares in only one way, i.e., 28068804 + 96100 = 5298^2 + 310^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 28164904.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1760299 + ... + 1760314.

Almost surely, 2^28164904 is an apocalyptic number.

It is an amenable number.

28164904 is a deficient number, since it is larger than the sum of its proper divisors (24644306).

28164904 is a wasteful number, since it uses less digits than its factorization.

28164904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3520619 (or 3520615 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 28164904 is about 5307.0617105890. The cubic root of 28164904 is about 304.2538565166.

The spelling of 28164904 in words is "twenty-eight million, one hundred sixty-four thousand, nine hundred four".