13831312 has 40 divisors (see below), whose sum is σ = 29596320. Its totient is φ = 6209280.

The previous prime is 13831283. The next prime is 13831331. The reversal of 13831312 is 21313831.

It is a Harshad number since it is a multiple of its sum of digits (22).

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, 15223 + ... + 16105.

It is an arithmetic number, because the mean of its divisors is an integer number (739908).

Almost surely, 2^13831312 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 13831312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14798160).

13831312 is an abundant number, since it is smaller than the sum of its proper divisors (15765008).

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

13831312 is a wasteful number, since it uses less digits than its factorization.

13831312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 991 (or 985 counting only the distinct ones).

The product of its digits is 432, while the sum is 22.

The square root of 13831312 is about 3719.0471898055. The cubic root of 13831312 is about 240.0423073564.

The spelling of 13831312 in words is "thirteen million, eight hundred thirty-one thousand, three hundred twelve".