13731804 has 18 divisors (see below), whose sum is σ = 34711040. Its totient is φ = 4577256.

The previous prime is 13731799. The next prime is 13731821. The reversal of 13731804 is 40813731.

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 190684 + ... + 190755.

Almost surely, 2^13731804 is an apocalyptic number.

It is an amenable number.

13731804 is an abundant number, since it is smaller than the sum of its proper divisors (20979236).

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

13731804 is a wasteful number, since it uses less digits than its factorization.

13731804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381449 (or 381444 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 13731804 is about 3705.6448831479. The cubic root of 13731804 is about 239.4652678077.

It can be divided in two parts, 13731 and 804, that added together give a triangular number (14535 = T₁₇₀).

The spelling of 13731804 in words is "thirteen million, seven hundred thirty-one thousand, eight hundred four".