28137572 has 12 divisors (see below), whose sum is σ = 50075760. Its totient is φ = 13830216.

The previous prime is 28137563. The next prime is 28137589. The reversal of 28137572 is 27573182.

28137572 is nontrivially palindromic in base 5.

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, 59378 + ... + 59849.

It is an arithmetic number, because the mean of its divisors is an integer number (4172980).

Almost surely, 2^28137572 is an apocalyptic number.

It is an amenable number.

28137572 is a deficient number, since it is larger than the sum of its proper divisors (21938188).

28137572 is a wasteful number, since it uses less digits than its factorization.

28137572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119290 (or 119288 counting only the distinct ones).

The product of its digits is 23520, while the sum is 35.

The square root of 28137572 is about 5304.4860259972. The cubic root of 28137572 is about 304.1554058841.

The spelling of 28137572 in words is "twenty-eight million, one hundred thirty-seven thousand, five hundred seventy-two".