12920908 has 72 divisors (see below), whose sum is σ = 30968784. Its totient is φ = 4636800.

The previous prime is 12920903. The next prime is 12920909. The reversal of 12920908 is 80902921.

It is a self number, because there is not a number n which added to its sum of digits gives 12920908.

It is not an unprimeable number, because it can be changed into a prime (12920903) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27798 + ... + 28258.

It is an arithmetic number, because the mean of its divisors is an integer number (430122).

Almost surely, 2^12920908 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12920908, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15484392).

12920908 is an abundant number, since it is smaller than the sum of its proper divisors (18047876).

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

12920908 is a wasteful number, since it uses less digits than its factorization.

12920908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 503 (or 494 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 12920908 is about 3594.5664550819. The cubic root of 12920908 is about 234.6556477623.

The spelling of 12920908 in words is "twelve million, nine hundred twenty thousand, nine hundred eight".