11815996 has 12 divisors (see below), whose sum is σ = 20910960. Its totient is φ = 5841440.

The previous prime is 11815961. The next prime is 11816009. The reversal of 11815996 is 69951811.

It is a super-2 number, since 2×11815996² = 279235522944032, which contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 16240 + ... + 16951.

It is an arithmetic number, because the mean of its divisors is an integer number (1742580).

Almost surely, 2^11815996 is an apocalyptic number.

It is an amenable number.

11815996 is a deficient number, since it is larger than the sum of its proper divisors (9094964).

11815996 is a wasteful number, since it uses less digits than its factorization.

11815996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33284 (or 33282 counting only the distinct ones).

The product of its digits is 19440, while the sum is 40.

The square root of 11815996 is about 3437.4403267548. The cubic root of 11815996 is about 227.7666382196.

The spelling of 11815996 in words is "eleven million, eight hundred fifteen thousand, nine hundred ninety-six".