13860520 has 32 divisors (see below), whose sum is σ = 31298400. Its totient is φ = 5524288.

The previous prime is 13860493. The next prime is 13860541. The reversal of 13860520 is 2506831.

It is a happy number.

It is a super-2 number, since 2×13860520² = 384228029340800, which contains 22 as substring.

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, 16347 + ... + 17173.

It is an arithmetic number, because the mean of its divisors is an integer number (978075).

Almost surely, 2^13860520 is an apocalyptic number.

13860520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13860520 is an abundant number, since it is smaller than the sum of its proper divisors (17437880).

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

13860520 is a wasteful number, since it uses less digits than its factorization.

13860520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1257 (or 1253 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 13860520 is about 3722.9719311324. The cubic root of 13860520 is about 240.2111567582.

The spelling of 13860520 in words is "thirteen million, eight hundred sixty thousand, five hundred twenty".