11721392 has 20 divisors (see below), whose sum is σ = 22791696. Its totient is φ = 5839680.

The previous prime is 11721373. The next prime is 11721397. The reversal of 11721392 is 29312711.

11721392 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (11721397) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3917 + ... + 6227.

Almost surely, 2^11721392 is an apocalyptic number.

It is an amenable number.

11721392 is a deficient number, since it is larger than the sum of its proper divisors (11070304).

11721392 is a wasteful number, since it uses less digits than its factorization.

11721392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2636 (or 2630 counting only the distinct ones).

The product of its digits is 756, while the sum is 26.

The square root of 11721392 is about 3423.6518514592. The cubic root of 11721392 is about 227.1571424484.

The spelling of 11721392 in words is "eleven million, seven hundred twenty-one thousand, three hundred ninety-two".