28930172 has 6 divisors (see below), whose sum is σ = 50627808. Its totient is φ = 14465084.

The previous prime is 28930169. The next prime is 28930193. The reversal of 28930172 is 27103982.

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, 3616268 + ... + 3616275.

It is an arithmetic number, because the mean of its divisors is an integer number (8437968).

Almost surely, 2^28930172 is an apocalyptic number.

It is an amenable number.

28930172 is a deficient number, since it is larger than the sum of its proper divisors (21697636).

28930172 is a wasteful number, since it uses less digits than its factorization.

28930172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7232547 (or 7232545 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 28930172 is about 5378.6775326283. The cubic root of 28930172 is about 306.9848938798.

The spelling of 28930172 in words is "twenty-eight million, nine hundred thirty thousand, one hundred seventy-two".