13921308 has 30 divisors (see below), whose sum is σ = 36393896. Its totient is φ = 4640328.

The previous prime is 13921289. The next prime is 13921331. The reversal of 13921308 is 80312931.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

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 9 ways as a sum of consecutive naturals, for example, 21160 + ... + 21807.

Almost surely, 2^13921308 is an apocalyptic number.

13921308 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

13921308 is an abundant number, since it is smaller than the sum of its proper divisors (22472588).

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

13921308 is a wasteful number, since it uses less digits than its factorization.

13921308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42983 (or 42972 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 13921308 is about 3731.1269075174. The cubic root of 13921308 is about 240.5618088522.

The spelling of 13921308 in words is "thirteen million, nine hundred twenty-one thousand, three hundred eight".