12913408 has 36 divisors (see below), whose sum is σ = 26167288. Its totient is φ = 6359040.

The previous prime is 12913399. The next prime is 12913423. The reversal of 12913408 is 80431921.

It is a happy number.

It is a super-2 number, since 2×12913408² = 333512212348928, which contains 22 as substring.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

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 3 ways as a sum of consecutive naturals, for example, 18343 + ... + 19033.

Almost surely, 2^12913408 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 12913408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13083644).

12913408 is an abundant number, since it is smaller than the sum of its proper divisors (13253880).

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

12913408 is an frugal number, since it uses more digits than its factorization.

12913408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 780 (or 766 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 12913408 is about 3593.5230623999. The cubic root of 12913408 is about 234.6102366610.

The spelling of 12913408 in words is "twelve million, nine hundred thirteen thousand, four hundred eight".