28407568 has 20 divisors (see below), whose sum is σ = 62902720. Its totient is φ = 12174624.

The previous prime is 28407551. The next prime is 28407581. The reversal of 28407568 is 86570482.

It is a self number, because there is not a number n which added to its sum of digits gives 28407568.

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, 126708 + ... + 126931.

It is an arithmetic number, because the mean of its divisors is an integer number (3145136).

Almost surely, 2^28407568 is an apocalyptic number.

28407568 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28407568 is an abundant number, since it is smaller than the sum of its proper divisors (34495152).

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

28407568 is a wasteful number, since it uses less digits than its factorization.

28407568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253654 (or 253648 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 40.

The square root of 28407568 is about 5329.8750454396. The cubic root of 28407568 is about 305.1251587023.

The spelling of 28407568 in words is "twenty-eight million, four hundred seven thousand, five hundred sixty-eight".