28442764 has 12 divisors (see below), whose sum is σ = 56885584. Its totient is φ = 12189744.

The previous prime is 28442749. The next prime is 28442797. The reversal of 28442764 is 46724482.

28442764 is an admirable 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, 507879 + ... + 507934.

Almost surely, 2^28442764 is an apocalyptic number.

It is an amenable number.

28442764 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

28442764 is a wasteful number, since it uses less digits than its factorization.

28442764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1015824 (or 1015822 counting only the distinct ones).

The product of its digits is 86016, while the sum is 37.

The square root of 28442764 is about 5333.1757893398. The cubic root of 28442764 is about 305.2511198895.

The spelling of 28442764 in words is "twenty-eight million, four hundred forty-two thousand, seven hundred sixty-four".