11813444 has 24 divisors (see below), whose sum is σ = 21880320. Its totient is φ = 5569344.

The previous prime is 11813441. The next prime is 11813447. The reversal of 11813444 is 44431811.

It is an interprime number because it is at equal distance from previous prime (11813441) and next prime (11813447).

It is a super-2 number, since 2×11813444² = 279114918282272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11813441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5837 + ... + 7595.

It is an arithmetic number, because the mean of its divisors is an integer number (911680).

Almost surely, 2^11813444 is an apocalyptic number.

It is an amenable number.

11813444 is a deficient number, since it is larger than the sum of its proper divisors (10066876).

11813444 is a wasteful number, since it uses less digits than its factorization.

11813444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1859 (or 1857 counting only the distinct ones).

The product of its digits is 1536, while the sum is 26.

The square root of 11813444 is about 3437.0691002655. The cubic root of 11813444 is about 227.7502394804.

The spelling of 11813444 in words is "eleven million, eight hundred thirteen thousand, four hundred forty-four".