12538660 has 24 divisors (see below), whose sum is σ = 26893440. Its totient is φ = 4908384.

The previous prime is 12538649. The next prime is 12538679. The reversal of 12538660 is 6683521.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5730 + ... + 7609.

It is an arithmetic number, because the mean of its divisors is an integer number (1120560).

Almost surely, 2^12538660 is an apocalyptic number.

12538660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12538660 is an abundant number, since it is smaller than the sum of its proper divisors (14354780).

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

12538660 is a wasteful number, since it uses less digits than its factorization.

12538660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13395 (or 13393 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 12538660 is about 3540.9970347347. The cubic root of 12538660 is about 232.3184538765.

The spelling of 12538660 in words is "twelve million, five hundred thirty-eight thousand, six hundred sixty".