13157856 has 96 divisors (see below), whose sum is σ = 39019680. Its totient is φ = 4313088.

The previous prime is 13157839. The next prime is 13157867. The reversal of 13157856 is 65875131.

13157856 is a `hidden beast` number, since 1 + 31 + 578 + 56 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 13157856.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83730 + ... + 83886.

It is an arithmetic number, because the mean of its divisors is an integer number (406455).

Almost surely, 2^13157856 is an apocalyptic number.

13157856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13157856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19509840).

13157856 is an abundant number, since it is smaller than the sum of its proper divisors (25861824).

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

13157856 is a wasteful number, since it uses less digits than its factorization.

13157856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273 (or 259 counting only the distinct ones).

The product of its digits is 25200, while the sum is 36.

The square root of 13157856 is about 3627.3759110409. The cubic root of 13157856 is about 236.0813661794.

The spelling of 13157856 in words is "thirteen million, one hundred fifty-seven thousand, eight hundred fifty-six".