12664320 has 160 divisors (see below), whose sum is σ = 43309728. Its totient is φ = 3145728.

The previous prime is 12664319. The next prime is 12664343. The reversal of 12664320 is 2346621.

It is a tau number, because it is divible by the number of its divisors (160).

It is a Harshad number since it is a multiple of its sum of digits (24).

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, 130512 + ... + 130608.

Almost surely, 2^12664320 is an apocalyptic number.

12664320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12664320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21654864).

12664320 is an abundant number, since it is smaller than the sum of its proper divisors (30645408).

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

12664320 is an equidigital number, since it uses as much as digits as its factorization.

12664320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140 (or 124 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 12664320 is about 3558.6963905340. The cubic root of 12664320 is about 233.0919590105.

It can be divided in two parts, 126 and 64320, that added together give a palindrome (64446).

The spelling of 12664320 in words is "twelve million, six hundred sixty-four thousand, three hundred twenty".