13731238 has 8 divisors (see below), whose sum is σ = 21035232. Its totient is φ = 6719496.

The previous prime is 13731217. The next prime is 13731251. The reversal of 13731238 is 83213731.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72945 + ... + 73132.

It is an arithmetic number, because the mean of its divisors is an integer number (2629404).

Almost surely, 2^13731238 is an apocalyptic number.

13731238 is a deficient number, since it is larger than the sum of its proper divisors (7303994).

13731238 is a wasteful number, since it uses less digits than its factorization.

13731238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146126.

The product of its digits is 3024, while the sum is 28.

The square root of 13731238 is about 3705.5685123878. The cubic root of 13731238 is about 239.4619776548.

Adding to 13731238 its reverse (83213731), we get a palindrome (96944969).

It can be divided in two parts, 137 and 31238, that added together give a triangular number (31375 = T₂₅₀).

The spelling of 13731238 in words is "thirteen million, seven hundred thirty-one thousand, two hundred thirty-eight".