12779964 has 48 divisors (see below), whose sum is σ = 33607840. Its totient is φ = 4199040.

The previous prime is 12779953. The next prime is 12779969. The reversal of 12779964 is 46997721.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12779969) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7074 + ... + 8694.

Almost surely, 2^12779964 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12779964, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16803920).

12779964 is an abundant number, since it is smaller than the sum of its proper divisors (20827876).

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

12779964 is a wasteful number, since it uses less digits than its factorization.

12779964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1707 (or 1699 counting only the distinct ones).

The product of its digits is 190512, while the sum is 45.

The square root of 12779964 is about 3574.9075512522. The cubic root of 12779964 is about 233.7993019439.

The spelling of 12779964 in words is "twelve million, seven hundred seventy-nine thousand, nine hundred sixty-four".