13815940 has 24 divisors (see below), whose sum is σ = 29115072. Its totient is φ = 5507040.

The previous prime is 13815937. The next prime is 13816013. The reversal of 13815940 is 4951831.

It is a super-3 number, since 3×13815940³ (a number of 22 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

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, 5577 + ... + 7663.

It is an arithmetic number, because the mean of its divisors is an integer number (1213128).

Almost surely, 2^13815940 is an apocalyptic number.

13815940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13815940 is an abundant number, since it is smaller than the sum of its proper divisors (15299132).

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

13815940 is a wasteful number, since it uses less digits than its factorization.

13815940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2427 (or 2425 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 13815940 is about 3716.9799569005. The cubic root of 13815940 is about 239.9533474135.

The spelling of 13815940 in words is "thirteen million, eight hundred fifteen thousand, nine hundred forty".