12638880 has 144 divisors (see below), whose sum is σ = 44108064. Its totient is φ = 3294720.

The previous prime is 12638849. The next prime is 12638893. The reversal of 12638880 is 8883621.

12638880 is a `hidden beast` number, since 12 + 638 + 8 + 8 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 96415 + ... + 96545.

It is an arithmetic number, because the mean of its divisors is an integer number (306306).

Almost surely, 2^12638880 is an apocalyptic number.

12638880 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 12638880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22054032).

12638880 is an abundant number, since it is smaller than the sum of its proper divisors (31469184).

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

12638880 is a wasteful number, since it uses less digits than its factorization.

12638880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219 (or 208 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 12638880 is about 3555.1202511308. The cubic root of 12638880 is about 232.9357765363.

The spelling of 12638880 in words is "twelve million, six hundred thirty-eight thousand, eight hundred eighty".