13990520 has 32 divisors (see below), whose sum is σ = 31799520. Its totient is φ = 5539200.

The previous prime is 13990511. The next prime is 13990531. The reversal of 13990520 is 2509931.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors.

It is a congruent 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, 2309 + ... + 5771.

It is an arithmetic number, because the mean of its divisors is an integer number (993735).

Almost surely, 2^13990520 is an apocalyptic number.

13990520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13990520 is an abundant number, since it is smaller than the sum of its proper divisors (17809000).

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

13990520 is a wasteful number, since it uses less digits than its factorization.

13990520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3575 (or 3571 counting only the distinct ones).

The product of its (nonzero) digits is 2430, while the sum is 29.

The square root of 13990520 is about 3740.3903539604. The cubic root of 13990520 is about 240.9598137800.

The spelling of 13990520 in words is "thirteen million, nine hundred ninety thousand, five hundred twenty".