12632640 has 56 divisors (see below), whose sum is σ = 40111680. Its totient is φ = 3368448.

The previous prime is 12632639. The next prime is 12632657. The reversal of 12632640 is 4623621.

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

It is a self number, because there is not a number n which added to its sum of digits gives 12632640.

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, 5620 + ... + 7539.

It is an arithmetic number, because the mean of its divisors is an integer number (716280).

Almost surely, 2^12632640 is an apocalyptic number.

12632640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12632640 is an abundant number, since it is smaller than the sum of its proper divisors (27479040).

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

12632640 is a wasteful number, since it uses less digits than its factorization.

12632640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13179 (or 13169 counting only the distinct ones).

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

The square root of 12632640 is about 3554.2425353372. The cubic root of 12632640 is about 232.8974356253.

The spelling of 12632640 in words is "twelve million, six hundred thirty-two thousand, six hundred forty".