11991896 has 16 divisors (see below), whose sum is σ = 25697040. Its totient is φ = 5139360.

The previous prime is 11991839. The next prime is 11991911. The reversal of 11991896 is 69819911.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 107015 + ... + 107126.

It is an arithmetic number, because the mean of its divisors is an integer number (1606065).

Almost surely, 2^11991896 is an apocalyptic number.

It is an amenable number.

11991896 is an abundant number, since it is smaller than the sum of its proper divisors (13705144).

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

11991896 is a wasteful number, since it uses less digits than its factorization.

11991896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214154 (or 214150 counting only the distinct ones).

The product of its digits is 34992, while the sum is 44.

The square root of 11991896 is about 3462.9317059393. The cubic root of 11991896 is about 228.8912993256.

The spelling of 11991896 in words is "eleven million, nine hundred ninety-one thousand, eight hundred ninety-six".