11691604 has 12 divisors (see below), whose sum is σ = 20671924. Its totient is φ = 5785344.

The previous prime is 11691587. The next prime is 11691643. The reversal of 11691604 is 40619611.

It can be written as a sum of positive squares in 2 ways, for example, as 4401604 + 7290000 = 2098^2 + 2700^2 .

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14679 + ... + 15454.

Almost surely, 2^11691604 is an apocalyptic number.

It is an amenable number.

11691604 is a deficient number, since it is larger than the sum of its proper divisors (8980320).

11691604 is a wasteful number, since it uses less digits than its factorization.

11691604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30234 (or 30232 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 11691604 is about 3419.2987585176. The cubic root of 11691604 is about 226.9645516396.

The spelling of 11691604 in words is "eleven million, six hundred ninety-one thousand, six hundred four".