13996520 has 16 divisors (see below), whose sum is σ = 31492260. Its totient is φ = 5598592.

The previous prime is 13996517. The next prime is 13996523. The reversal of 13996520 is 2569931.

13996520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (13996517) and next prime (13996523).

It can be written as a sum of positive squares in 2 ways, for example, as 11847364 + 2149156 = 3442^2 + 1466^2 .

It is a super-2 number, since 2×13996520² = 391805144220800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13996523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 174917 + ... + 174996.

Almost surely, 2^13996520 is an apocalyptic number.

13996520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13996520 is an abundant number, since it is smaller than the sum of its proper divisors (17495740).

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

13996520 is a wasteful number, since it uses less digits than its factorization.

13996520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349924 (or 349920 counting only the distinct ones).

The product of its (nonzero) digits is 14580, while the sum is 35.

The square root of 13996520 is about 3741.1923233108. The cubic root of 13996520 is about 240.9942550125.

The spelling of 13996520 in words is "thirteen million, nine hundred ninety-six thousand, five hundred twenty".