13109780 has 12 divisors (see below), whose sum is σ = 27530580. Its totient is φ = 5243904.

The previous prime is 13109779. The next prime is 13109809. The reversal of 13109780 is 8790131.

It can be written as a sum of positive squares in 2 ways, for example, as 7214596 + 5895184 = 2686^2 + 2428^2 .

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 3 ways as a sum of consecutive naturals, for example, 327725 + ... + 327764.

It is an arithmetic number, because the mean of its divisors is an integer number (2294215).

Almost surely, 2^13109780 is an apocalyptic number.

13109780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13109780 is an abundant number, since it is smaller than the sum of its proper divisors (14420800).

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

13109780 is a wasteful number, since it uses less digits than its factorization.

13109780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 655498 (or 655496 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 29.

The square root of 13109780 is about 3620.7430176692. The cubic root of 13109780 is about 235.7934849522.

The spelling of 13109780 in words is "thirteen million, one hundred nine thousand, seven hundred eighty".