12811896 has 24 divisors (see below), whose sum is σ = 34699080. Its totient is φ = 4270608.

The previous prime is 12811889. The next prime is 12811907. The reversal of 12811896 is 69811821.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×12811896² = 328289358229632, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

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

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 12811896.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 88900 + ... + 89043.

It is an arithmetic number, because the mean of its divisors is an integer number (1445795).

Almost surely, 2^12811896 is an apocalyptic number.

It is an amenable number.

12811896 is an abundant number, since it is smaller than the sum of its proper divisors (21887184).

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

12811896 is a wasteful number, since it uses less digits than its factorization.

12811896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177955 (or 177948 counting only the distinct ones).

The product of its digits is 6912, while the sum is 36.

The square root of 12811896 is about 3579.3708944450. The cubic root of 12811896 is about 233.9938635252.

The spelling of 12811896 in words is "twelve million, eight hundred eleven thousand, eight hundred ninety-six".