12598640 has 20 divisors (see below), whose sum is σ = 29292024. Its totient is φ = 5039424.

The previous prime is 12598637. The next prime is 12598661. The reversal of 12598640 is 4689521.

It is a tau number, because it is divible by the number of its divisors (20).

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 12598640.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78662 + ... + 78821.

Almost surely, 2^12598640 is an apocalyptic number.

12598640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12598640 is an abundant number, since it is smaller than the sum of its proper divisors (16693384).

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

12598640 is a wasteful number, since it uses less digits than its factorization.

12598640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157496 (or 157490 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 12598640 is about 3549.4562963924. The cubic root of 12598640 is about 232.6883046882.

The spelling of 12598640 in words is "twelve million, five hundred ninety-eight thousand, six hundred forty".