12639850 has 24 divisors (see below), whose sum is σ = 24060960. Its totient is φ = 4937520.

The previous prime is 12639839. The next prime is 12639881. The reversal of 12639850 is 5893621.

12639850 = 181² + 182² + ... + 352².

12639850 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 790 + ... + 5089.

It is an arithmetic number, because the mean of its divisors is an integer number (1002540).

Almost surely, 2^12639850 is an apocalyptic number.

12639850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12639850 is a deficient number, since it is larger than the sum of its proper divisors (11421110).

12639850 is a wasteful number, since it uses less digits than its factorization.

12639850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5934 (or 5929 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 12639850 is about 3555.2566714655. The cubic root of 12639850 is about 232.9417354483.

The spelling of 12639850 in words is "twelve million, six hundred thirty-nine thousand, eight hundred fifty".