11991796 has 6 divisors (see below), whose sum is σ = 20985650. Its totient is φ = 5995896.

The previous prime is 11991781. The next prime is 11991839. The reversal of 11991796 is 69719911.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 11655396 + 336400 = 3414^2 + 580^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1498971 + ... + 1498978.

Almost surely, 2^11991796 is an apocalyptic number.

It is an amenable number.

11991796 is a deficient number, since it is larger than the sum of its proper divisors (8993854).

11991796 is a wasteful number, since it uses less digits than its factorization.

11991796 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2997953 (or 2997951 counting only the distinct ones).

The product of its digits is 30618, while the sum is 43.

The square root of 11991796 is about 3462.9172672762. The cubic root of 11991796 is about 228.8906630850.

The spelling of 11991796 in words is "eleven million, nine hundred ninety-one thousand, seven hundred ninety-six".