11721936 has 40 divisors (see below), whose sum is σ = 31877920. Its totient is φ = 3701376.

The previous prime is 11721911. The next prime is 11721947. The reversal of 11721936 is 63912711.

11721936 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 7 ways as a sum of consecutive naturals, for example, 5515 + ... + 7338.

It is an arithmetic number, because the mean of its divisors is an integer number (796948).

Almost surely, 2^11721936 is an apocalyptic number.

11721936 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

11721936 is an abundant number, since it is smaller than the sum of its proper divisors (20155984).

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

11721936 is a wasteful number, since it uses less digits than its factorization.

11721936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12883 (or 12877 counting only the distinct ones).

The product of its digits is 2268, while the sum is 30.

The square root of 11721936 is about 3423.7312978679. The cubic root of 11721936 is about 227.1606565809.

The spelling of 11721936 in words is "eleven million, seven hundred twenty-one thousand, nine hundred thirty-six".