12639930 has 16 divisors (see below), whose sum is σ = 30335904. Its totient is φ = 3370640.

The previous prime is 12639923. The next prime is 12639941. The reversal of 12639930 is 3993621.

It is a junction number, because it is equal to n+sod(n) for n = 12639891 and 12639900.

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, 210636 + ... + 210695.

It is an arithmetic number, because the mean of its divisors is an integer number (1895994).

Almost surely, 2^12639930 is an apocalyptic number.

12639930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12639930 is an abundant number, since it is smaller than the sum of its proper divisors (17695974).

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

12639930 is a wasteful number, since it uses less digits than its factorization.

12639930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421341.

The product of its (nonzero) digits is 8748, while the sum is 33.

The square root of 12639930 is about 3555.2679223935. The cubic root of 12639930 is about 232.9422268914.

The spelling of 12639930 in words is "twelve million, six hundred thirty-nine thousand, nine hundred thirty".