12639650 has 48 divisors (see below), whose sum is σ = 25444800. Its totient is φ = 4656960.

The previous prime is 12639637. The next prime is 12639659. The reversal of 12639650 is 5693621.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (12639659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33161 + ... + 33539.

It is an arithmetic number, because the mean of its divisors is an integer number (530100).

Almost surely, 2^12639650 is an apocalyptic number.

12639650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12639650 is an abundant number, since it is smaller than the sum of its proper divisors (12805150).

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

12639650 is a wasteful number, since it uses less digits than its factorization.

12639650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443 (or 438 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 12639650 is about 3555.2285439898. The cubic root of 12639650 is about 232.9405068316.

The spelling of 12639650 in words is "twelve million, six hundred thirty-nine thousand, six hundred fifty".