13891908 has 24 divisors (see below), whose sum is σ = 33824448. Its totient is φ = 4429216.

The previous prime is 13891903. The next prime is 13891949. The reversal of 13891908 is 80919831.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (13891901) by changing a digit.

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, 24891 + ... + 25442.

It is an arithmetic number, because the mean of its divisors is an integer number (1409352).

Almost surely, 2^13891908 is an apocalyptic number.

It is an amenable number.

13891908 is an abundant number, since it is smaller than the sum of its proper divisors (19932540).

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

13891908 is a wasteful number, since it uses less digits than its factorization.

13891908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50363 (or 50361 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 39.

The square root of 13891908 is about 3727.1849967502. The cubic root of 13891908 is about 240.3923443695.

The spelling of 13891908 in words is "thirteen million, eight hundred ninety-one thousand, nine hundred eight".