13157808 has 20 divisors (see below), whose sum is σ = 33991128. Its totient is φ = 4385920.

The previous prime is 13157803. The next prime is 13157819. The reversal of 13157808 is 80875131.

It is a super-2 number, since 2×13157808² = 346255822729728, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13157801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137013 + ... + 137108.

Almost surely, 2^13157808 is an apocalyptic number.

It is an amenable number.

13157808 is an abundant number, since it is smaller than the sum of its proper divisors (20833320).

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

13157808 is a wasteful number, since it uses less digits than its factorization.

13157808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274132 (or 274126 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 33.

The square root of 13157808 is about 3627.3692946818. The cubic root of 13157808 is about 236.0810791032.

The spelling of 13157808 in words is "thirteen million, one hundred fifty-seven thousand, eight hundred eight".