13112780 has 24 divisors (see below), whose sum is σ = 29157408. Its totient is φ = 4936448.

The previous prime is 13112773. The next prime is 13112819. The reversal of 13112780 is 8721131.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18944 + ... + 19623.

It is an arithmetic number, because the mean of its divisors is an integer number (1214892).

Almost surely, 2^13112780 is an apocalyptic number.

13112780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13112780 is an abundant number, since it is smaller than the sum of its proper divisors (16044628).

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

13112780 is a wasteful number, since it uses less digits than its factorization.

13112780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38593 (or 38591 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 23.

The square root of 13112780 is about 3621.1572735798. The cubic root of 13112780 is about 235.8114696553.

The spelling of 13112780 in words is "thirteen million, one hundred twelve thousand, seven hundred eighty".