12587640 has 64 divisors (see below), whose sum is σ = 40672800. Its totient is φ = 3098112.

The previous prime is 12587629. The next prime is 12587677. The reversal of 12587640 is 4678521.

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, 2475 + ... + 5594.

Almost surely, 2^12587640 is an apocalyptic number.

12587640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12587640 is an abundant number, since it is smaller than the sum of its proper divisors (28085160).

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

12587640 is a wasteful number, since it uses less digits than its factorization.

12587640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8096 (or 8092 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 12587640 is about 3547.9064249216. The cubic root of 12587640 is about 232.6205641321.

The spelling of 12587640 in words is "twelve million, five hundred eighty-seven thousand, six hundred forty".