12649920 has 56 divisors (see below), whose sum is σ = 40166544. Its totient is φ = 3373056.

The previous prime is 12649919. The next prime is 12649937. The reversal of 12649920 is 2994621.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5629 + ... + 7548.

Almost surely, 2^12649920 is an apocalyptic number.

12649920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12649920 is an abundant number, since it is smaller than the sum of its proper divisors (27516624).

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

12649920 is a wasteful number, since it uses less digits than its factorization.

12649920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13197 (or 13187 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 12649920 is about 3556.6726023068. The cubic root of 12649920 is about 233.0035795529.

The spelling of 12649920 in words is "twelve million, six hundred forty-nine thousand, nine hundred twenty".