28442928 has 20 divisors (see below), whose sum is σ = 73477688. Its totient is φ = 9480960.

The previous prime is 28442893. The next prime is 28442929. The reversal of 28442928 is 82924482.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (28442929) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 296233 + ... + 296328.

Almost surely, 2^28442928 is an apocalyptic number.

It is an amenable number.

28442928 is an abundant number, since it is smaller than the sum of its proper divisors (45034760).

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

28442928 is a wasteful number, since it uses less digits than its factorization.

28442928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 592572 (or 592566 counting only the distinct ones).

The product of its digits is 73728, while the sum is 39.

The square root of 28442928 is about 5333.1911647718. The cubic root of 28442928 is about 305.2517065775.

The spelling of 28442928 in words is "twenty-eight million, four hundred forty-two thousand, nine hundred twenty-eight".