28272372 has 24 divisors (see below), whose sum is σ = 68097792. Its totient is φ = 9120000.

The previous prime is 28272353. The next prime is 28272383. The reversal of 28272372 is 27327282.

It is a congruent number.

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, 37629 + ... + 38372.

It is an arithmetic number, because the mean of its divisors is an integer number (2837408).

Almost surely, 2^28272372 is an apocalyptic number.

It is an amenable number.

28272372 is an abundant number, since it is smaller than the sum of its proper divisors (39825420).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28272372 is a wasteful number, since it uses less digits than its factorization.

28272372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76039 (or 76037 counting only the distinct ones).

The product of its digits is 18816, while the sum is 33.

The square root of 28272372 is about 5317.1770705892. The cubic root of 28272372 is about 304.6403428767.

The spelling of 28272372 in words is "twenty-eight million, two hundred seventy-two thousand, three hundred seventy-two".