28578472 has 32 divisors (see below), whose sum is σ = 57970080. Its totient is φ = 13129920.

The previous prime is 28578469. The next prime is 28578499. The reversal of 28578472 is 27487582.

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, 28947 + ... + 29917.

It is an arithmetic number, because the mean of its divisors is an integer number (1811565).

Almost surely, 2^28578472 is an apocalyptic number.

It is an amenable number.

28578472 is an abundant number, since it is smaller than the sum of its proper divisors (29391608).

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

28578472 is a wasteful number, since it uses less digits than its factorization.

28578472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1273 (or 1269 counting only the distinct ones).

The product of its digits is 250880, while the sum is 43.

The square root of 28578472 is about 5345.8836500620. The cubic root of 28578472 is about 305.7358279368.

The spelling of 28578472 in words is "twenty-eight million, five hundred seventy-eight thousand, four hundred seventy-two".