13138660 has 24 divisors (see below), whose sum is σ = 27684216. Its totient is φ = 5237760.

The previous prime is 13138639. The next prime is 13138673. The reversal of 13138660 is 6683131.

13138660 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 135424 + 13003236 = 368^2 + 3606^2 .

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, 6130 + ... + 7990.

It is an arithmetic number, because the mean of its divisors is an integer number (1153509).

Almost surely, 2^13138660 is an apocalyptic number.

13138660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13138660 is an abundant number, since it is smaller than the sum of its proper divisors (14545556).

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

13138660 is a wasteful number, since it uses less digits than its factorization.

13138660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2223 (or 2221 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 13138660 is about 3624.7289553841. The cubic root of 13138660 is about 235.9665039121.

The spelling of 13138660 in words is "thirteen million, one hundred thirty-eight thousand, six hundred sixty".