28861472 has 24 divisors (see below), whose sum is σ = 57039696. Its totient is φ = 14375232.

The previous prime is 28861463. The next prime is 28861487. The reversal of 28861472 is 27416882.

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, 7463 + ... + 10649.

It is an arithmetic number, because the mean of its divisors is an integer number (2376654).

Almost surely, 2^28861472 is an apocalyptic number.

It is an amenable number.

28861472 is a deficient number, since it is larger than the sum of its proper divisors (28178224).

28861472 is a wasteful number, since it uses less digits than its factorization.

28861472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3480 (or 3472 counting only the distinct ones).

The product of its digits is 43008, while the sum is 38.

The square root of 28861472 is about 5372.2874085440. The cubic root of 28861472 is about 306.7417039651.

The spelling of 28861472 in words is "twenty-eight million, eight hundred sixty-one thousand, four hundred seventy-two".