11533988 has 24 divisors (see below), whose sum is σ = 21705600. Its totient is φ = 5345568.

The previous prime is 11533987. The next prime is 11533993. The reversal of 11533988 is 88933511.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is not an unprimeable number, because it can be changed into a prime (11533981) 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, 1958 + ... + 5186.

It is an arithmetic number, because the mean of its divisors is an integer number (904400).

Almost surely, 2^11533988 is an apocalyptic number.

It is an amenable number.

11533988 is a deficient number, since it is larger than the sum of its proper divisors (10171612).

11533988 is a wasteful number, since it uses less digits than its factorization.

11533988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3299 (or 3297 counting only the distinct ones).

The product of its digits is 25920, while the sum is 38.

The square root of 11533988 is about 3396.1725515645. The cubic root of 11533988 is about 225.9400211524.

It can be divided in two parts, 11533 and 988, that added together give a palindrome (12521).

The spelling of 11533988 in words is "eleven million, five hundred thirty-three thousand, nine hundred eighty-eight".