13664280 has 64 divisors (see below), whose sum is σ = 46851840. Its totient is φ = 3123072.

The previous prime is 13664279. The next prime is 13664303. The reversal of 13664280 is 8246631.

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 15 ways as a sum of consecutive naturals, for example, 7294 + ... + 8973.

It is an arithmetic number, because the mean of its divisors is an integer number (732060).

Almost surely, 2^13664280 is an apocalyptic number.

13664280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13664280 is an abundant number, since it is smaller than the sum of its proper divisors (33187560).

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

13664280 is a wasteful number, since it uses less digits than its factorization.

13664280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16288 (or 16284 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 13664280 is about 3696.5226903132. The cubic root of 13664280 is about 239.0721116645.

The spelling of 13664280 in words is "thirteen million, six hundred sixty-four thousand, two hundred eighty".