11971864 has 16 divisors (see below), whose sum is σ = 22510800. Its totient is φ = 5968992.

The previous prime is 11971853. The next prime is 11971871. The reversal of 11971864 is 46817911.

11971864 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 1189 + ... + 5035.

It is an arithmetic number, because the mean of its divisors is an integer number (1406925).

Almost surely, 2^11971864 is an apocalyptic number.

It is an amenable number.

11971864 is a deficient number, since it is larger than the sum of its proper divisors (10538936).

11971864 is a wasteful number, since it uses less digits than its factorization.

11971864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4242 (or 4238 counting only the distinct ones).

The product of its digits is 12096, while the sum is 37.

The square root of 11971864 is about 3460.0381500787. The cubic root of 11971864 is about 228.7637769281.

The spelling of 11971864 in words is "eleven million, nine hundred seventy-one thousand, eight hundred sixty-four".