11813388 has 24 divisors (see below), whose sum is σ = 27620208. Its totient is φ = 3929856.

The previous prime is 11813377. The next prime is 11813401. The reversal of 11813388 is 88331811.

It is a super-2 number, since 2×11813388² = 279112272077088, which contains 22 as substring.

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, 10920 + ... + 11952.

It is an arithmetic number, because the mean of its divisors is an integer number (1150842).

Almost surely, 2^11813388 is an apocalyptic number.

It is an amenable number.

11813388 is an abundant number, since it is smaller than the sum of its proper divisors (15806820).

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

11813388 is a wasteful number, since it uses less digits than its factorization.

11813388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1993 (or 1991 counting only the distinct ones).

The product of its digits is 4608, while the sum is 33.

The square root of 11813388 is about 3437.0609537801. The cubic root of 11813388 is about 227.7498796070.

The spelling of 11813388 in words is "eleven million, eight hundred thirteen thousand, three hundred eighty-eight".