11563988 has 6 divisors (see below), whose sum is σ = 20236986. Its totient is φ = 5781992.

The previous prime is 11563987. The next prime is 11563997. The reversal of 11563988 is 88936511.

11563988 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 9746884 + 1817104 = 3122^2 + 1348^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11563987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1445495 + ... + 1445502.

It is an arithmetic number, because the mean of its divisors is an integer number (3372831).

Almost surely, 2^11563988 is an apocalyptic number.

It is an amenable number.

11563988 is a deficient number, since it is larger than the sum of its proper divisors (8672998).

11563988 is a wasteful number, since it uses less digits than its factorization.

11563988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2891001 (or 2890999 counting only the distinct ones).

The product of its digits is 51840, while the sum is 41.

The square root of 11563988 is about 3400.5864200164. The cubic root of 11563988 is about 226.1357421927.

The spelling of 11563988 in words is "eleven million, five hundred sixty-three thousand, nine hundred eighty-eight".