12779604 has 36 divisors (see below), whose sum is σ = 33420660. Its totient is φ = 4112640.

The previous prime is 12779573. The next prime is 12779621. The reversal of 12779604 is 40697721.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 4928400 + 7851204 = 2220^2 + 2802^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5077 + ... + 7164.

Almost surely, 2^12779604 is an apocalyptic number.

It is an amenable number.

12779604 is an abundant number, since it is smaller than the sum of its proper divisors (20641056).

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

12779604 is a wasteful number, since it uses less digits than its factorization.

12779604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12280 (or 12275 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 12779604 is about 3574.8571999452. The cubic root of 12779604 is about 233.7971066185.

The spelling of 12779604 in words is "twelve million, seven hundred seventy-nine thousand, six hundred four".