28745524 has 12 divisors (see below), whose sum is σ = 50506848. Its totient is φ = 14315000.

The previous prime is 28745513. The next prime is 28745531. The reversal of 28745524 is 42554782.

It is a happy number.

It is a congruent 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, 13312 + ... + 15319.

It is an arithmetic number, because the mean of its divisors is an integer number (4208904).

Almost surely, 2^28745524 is an apocalyptic number.

It is an amenable number.

28745524 is a deficient number, since it is larger than the sum of its proper divisors (21761324).

28745524 is a wasteful number, since it uses less digits than its factorization.

28745524 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28886 (or 28884 counting only the distinct ones).

The product of its digits is 89600, while the sum is 37.

The square root of 28745524 is about 5361.4852419829. The cubic root of 28745524 is about 306.3303848961.

The spelling of 28745524 in words is "twenty-eight million, seven hundred forty-five thousand, five hundred twenty-four".