28656360 has 48 divisors (see below), whose sum is σ = 93134340. Its totient is φ = 7641600.

The previous prime is 28656349. The next prime is 28656391. The reversal of 28656360 is 6365682.

It can be written as a sum of positive squares in 2 ways, for example, as 22982436 + 5673924 = 4794^2 + 2382^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39441 + ... + 40160.

Almost surely, 2^28656360 is an apocalyptic number.

28656360 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28656360 is an abundant number, since it is smaller than the sum of its proper divisors (64477980).

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

28656360 is a wasteful number, since it uses less digits than its factorization.

28656360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79618 (or 79611 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 28656360 is about 5353.1635506493. The cubic root of 28656360 is about 306.0133276266.

The spelling of 28656360 in words is "twenty-eight million, six hundred fifty-six thousand, three hundred sixty".