13815738 has 16 divisors (see below), whose sum is σ = 30701760. Its totient is φ = 4605228.

The previous prime is 13815721. The next prime is 13815749. The reversal of 13815738 is 83751831.

13815738 is a `hidden beast` number, since 1 + 3 + 81 + 573 + 8 = 666.

It is a hoax number, since the sum of its digits (36) 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, 127870 + ... + 127977.

It is an arithmetic number, because the mean of its divisors is an integer number (1918860).

Almost surely, 2^13815738 is an apocalyptic number.

13815738 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

13815738 is an abundant number, since it is smaller than the sum of its proper divisors (16886022).

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

13815738 is a wasteful number, since it uses less digits than its factorization.

13815738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255858 (or 255852 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 13815738 is about 3716.9527842037. The cubic root of 13815738 is about 239.9521779717.

It can be divided in two parts, 138 and 15738, that added together give a square (15876 = 126²).

The spelling of 13815738 in words is "thirteen million, eight hundred fifteen thousand, seven hundred thirty-eight".