28875582 has 32 divisors (see below), whose sum is σ = 64646400. Its totient is φ = 9553464.

The previous prime is 28875547. The next prime is 28875599. The reversal of 28875582 is 28557882.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5583 + ... + 9429.

It is an arithmetic number, because the mean of its divisors is an integer number (2020200).

Almost surely, 2^28875582 is an apocalyptic number.

28875582 is an abundant number, since it is smaller than the sum of its proper divisors (35770818).

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

28875582 is a wasteful number, since it uses less digits than its factorization.

28875582 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3997 (or 3991 counting only the distinct ones).

The product of its digits is 358400, while the sum is 45.

The square root of 28875582 is about 5373.6004689593. The cubic root of 28875582 is about 306.7916831705.

The spelling of 28875582 in words is "twenty-eight million, eight hundred seventy-five thousand, five hundred eighty-two".