13087940 has 12 divisors (see below), whose sum is σ = 27484716. Its totient is φ = 5235168.

The previous prime is 13087939. The next prime is 13087967. The reversal of 13087940 is 4978031.

13087940 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 2 ways, for example, as 9523396 + 3564544 = 3086^2 + 1888^2 .

It is a junction number, because it is equal to n+sod(n) for n = 13087897 and 13087906.

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, 327179 + ... + 327218.

It is an arithmetic number, because the mean of its divisors is an integer number (2290393).

Almost surely, 2^13087940 is an apocalyptic number.

13087940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13087940 is an abundant number, since it is smaller than the sum of its proper divisors (14396776).

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

13087940 is a wasteful number, since it uses less digits than its factorization.

13087940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 654406 (or 654404 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 13087940 is about 3617.7258049775. The cubic root of 13087940 is about 235.6624735480.

The spelling of 13087940 in words is "thirteen million, eighty-seven thousand, nine hundred forty".