28387604 has 12 divisors (see below), whose sum is σ = 56775264. Its totient is φ = 12166104.

The previous prime is 28387573. The next prime is 28387627. The reversal of 28387604 is 40678382.

28387604 is an admirable number.

It is a super-4 number, since 4×28387604⁴ (a number of 31 digits) contains 4444 as substring.

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, 506894 + ... + 506949.

It is an arithmetic number, because the mean of its divisors is an integer number (4731272).

Almost surely, 2^28387604 is an apocalyptic number.

It is an amenable number.

28387604 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.

28387604 is a wasteful number, since it uses less digits than its factorization.

28387604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1013854 (or 1013852 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 38.

The square root of 28387604 is about 5328.0018768765. The cubic root of 28387604 is about 305.0536643009.

The spelling of 28387604 in words is "twenty-eight million, three hundred eighty-seven thousand, six hundred four".