11989764 has 18 divisors (see below), whose sum is σ = 30307550. Its totient is φ = 3996576.

The previous prime is 11989763. The next prime is 11989781. The reversal of 11989764 is 46798911.

It is a happy number.

11989764 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., 8749764 + 3240000 = 2958^2 + 1800^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is not an unprimeable number, because it can be changed into a prime (11989763) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 166489 + ... + 166560.

Almost surely, 2^11989764 is an apocalyptic number.

It is an amenable number.

11989764 is an abundant number, since it is smaller than the sum of its proper divisors (18317786).

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

11989764 is a wasteful number, since it uses less digits than its factorization.

11989764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333059 (or 333054 counting only the distinct ones).

The product of its digits is 108864, while the sum is 45.

The square root of 11989764 is about 3462.6238606005. The cubic root of 11989764 is about 228.8777339096.

The spelling of 11989764 in words is "eleven million, nine hundred eighty-nine thousand, seven hundred sixty-four".