12699760 has 20 divisors (see below), whose sum is σ = 29527128. Its totient is φ = 5079872.

The previous prime is 12699751. The next prime is 12699779. The reversal of 12699760 is 6799621.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×12699760² = 322567808115200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79294 + ... + 79453.

Almost surely, 2^12699760 is an apocalyptic number.

12699760 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12699760 is an abundant number, since it is smaller than the sum of its proper divisors (16827368).

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

12699760 is a wasteful number, since it uses less digits than its factorization.

12699760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158760 (or 158754 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 12699760 is about 3563.6722632700. The cubic root of 12699760 is about 233.3091857097.

The spelling of 12699760 in words is "twelve million, six hundred ninety-nine thousand, seven hundred sixty".