13815660 has 48 divisors (see below), whose sum is σ = 40723200. Its totient is φ = 3489984.

The previous prime is 13815649. The next prime is 13815661. The reversal of 13815660 is 6651831.

It is a super-2 number, since 2×13815660² = 381744922471200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (13815661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4920 + ... + 7199.

It is an arithmetic number, because the mean of its divisors is an integer number (848400).

Almost surely, 2^13815660 is an apocalyptic number.

13815660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13815660 is an abundant number, since it is smaller than the sum of its proper divisors (26907540).

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

13815660 is a wasteful number, since it uses less digits than its factorization.

13815660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12150 (or 12148 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 13815660 is about 3716.9422917231. The cubic root of 13815660 is about 239.9517264020.

The spelling of 13815660 in words is "thirteen million, eight hundred fifteen thousand, six hundred sixty".