12779320 has 16 divisors (see below), whose sum is σ = 28753560. Its totient is φ = 5111712.

The previous prime is 12779311. The next prime is 12779321. The reversal of 12779320 is 2397721.

It is a super-2 number, since 2×12779320² = 326622039324800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12779321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 159702 + ... + 159781.

Almost surely, 2^12779320 is an apocalyptic number.

12779320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12779320 is an abundant number, since it is smaller than the sum of its proper divisors (15974240).

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

12779320 is a wasteful number, since it uses less digits than its factorization.

12779320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319494 (or 319490 counting only the distinct ones).

The product of its (nonzero) digits is 5292, while the sum is 31.

The square root of 12779320 is about 3574.8174778581. The cubic root of 12779320 is about 233.7953747216.

The spelling of 12779320 in words is "twelve million, seven hundred seventy-nine thousand, three hundred twenty".