28307572 has 12 divisors (see below), whose sum is σ = 51692256. Its totient is φ = 13538360.

The previous prime is 28307569. The next prime is 28307611. The reversal of 28307572 is 27570382.

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, 153754 + ... + 153937.

It is an arithmetic number, because the mean of its divisors is an integer number (4307688).

Almost surely, 2^28307572 is an apocalyptic number.

It is an amenable number.

28307572 is a deficient number, since it is larger than the sum of its proper divisors (23384684).

28307572 is a wasteful number, since it uses less digits than its factorization.

28307572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307718 (or 307716 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 34.

The square root of 28307572 is about 5320.4860680205. The cubic root of 28307572 is about 304.7667194071.

The spelling of 28307572 in words is "twenty-eight million, three hundred seven thousand, five hundred seventy-two".