12644880 has 160 divisors (see below), whose sum is σ = 42854400. Its totient is φ = 3073536.

The previous prime is 12644867. The next prime is 12644893. The reversal of 12644880 is 8844621.

It is an interprime number because it is at equal distance from previous prime (12644867) and next prime (12644893).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 214291 + ... + 214349.

It is an arithmetic number, because the mean of its divisors is an integer number (267840).

Almost surely, 2^12644880 is an apocalyptic number.

12644880 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 12644880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21427200).

12644880 is an abundant number, since it is smaller than the sum of its proper divisors (30209520).

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

12644880 is a wasteful number, since it uses less digits than its factorization.

12644880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141 (or 135 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 33.

The square root of 12644880 is about 3555.9640043173. The cubic root of 12644880 is about 232.9726308977.

The spelling of 12644880 in words is "twelve million, six hundred forty-four thousand, eight hundred eighty".