28387704 has 32 divisors (see below), whose sum is σ = 74056320. Its totient is φ = 9050976.

The previous prime is 28387693. The next prime is 28387721. The reversal of 28387704 is 40778382.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25162 + ... + 26265.

It is an arithmetic number, because the mean of its divisors is an integer number (2314260).

Almost surely, 2^28387704 is an apocalyptic number.

28387704 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28387704 is an abundant number, since it is smaller than the sum of its proper divisors (45668616).

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

28387704 is a wasteful number, since it uses less digits than its factorization.

28387704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51459 (or 51455 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 39.

The square root of 28387704 is about 5328.0112612494. The cubic root of 28387704 is about 305.0540225010.

The spelling of 28387704 in words is "twenty-eight million, three hundred eighty-seven thousand, seven hundred four".