13731392 has 28 divisors (see below), whose sum is σ = 27918156. Its totient is φ = 6696960.

The previous prime is 13731353. The next prime is 13731401. The reversal of 13731392 is 29313731.

It can be written as a sum of positive squares in 2 ways, for example, as 7054336 + 6677056 = 2656^2 + 2584^2 .

It is a super-2 number, since 2×13731392² = 377102252515328, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8 + ... + 5240.

It is an arithmetic number, because the mean of its divisors is an integer number (997077).

Almost surely, 2^13731392 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13731392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13959078).

13731392 is an abundant number, since it is smaller than the sum of its proper divisors (14186764).

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

13731392 is an equidigital number, since it uses as much as digits as its factorization.

13731392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5286 (or 5276 counting only the distinct ones).

The product of its digits is 3402, while the sum is 29.

The square root of 13731392 is about 3705.5892918671. The cubic root of 13731392 is about 239.4628728644.

The spelling of 13731392 in words is "thirteen million, seven hundred thirty-one thousand, three hundred ninety-two".