11931764 has 24 divisors (see below), whose sum is σ = 22596840. Its totient is φ = 5480064.

The previous prime is 11931743. The next prime is 11931767. The reversal of 11931764 is 46713911.

It can be written as a sum of positive squares in 4 ways, for example, as 1304164 + 10627600 = 1142^2 + 3260^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 11931764.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11931767) 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, 13562 + ... + 14414.

It is an arithmetic number, because the mean of its divisors is an integer number (941535).

Almost surely, 2^11931764 is an apocalyptic number.

It is an amenable number.

11931764 is a deficient number, since it is larger than the sum of its proper divisors (10665076).

11931764 is a wasteful number, since it uses less digits than its factorization.

11931764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1139 (or 1137 counting only the distinct ones).

The product of its digits is 4536, while the sum is 32.

The square root of 11931764 is about 3454.2385557457. The cubic root of 11931764 is about 228.5080749269.

The spelling of 11931764 in words is "eleven million, nine hundred thirty-one thousand, seven hundred sixty-four".