27664320 has 56 divisors (see below), whose sum is σ = 87837264. Its totient is φ = 7376896.

The previous prime is 27664319. The next prime is 27664339. The reversal of 27664320 is 2346672.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 13449 + ... + 15368.

Almost surely, 2^27664320 is an apocalyptic number.

27664320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27664320 is an abundant number, since it is smaller than the sum of its proper divisors (60172944).

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

27664320 is a wasteful number, since it uses less digits than its factorization.

27664320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28837 (or 28827 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 30.

The square root of 27664320 is about 5259.6882036866. The cubic root of 27664320 is about 302.4405365440.

The spelling of 27664320 in words is "twenty-seven million, six hundred sixty-four thousand, three hundred twenty".