13831938 has 16 divisors (see below), whose sum is σ = 30737760. Its totient is φ = 4610628.

The previous prime is 13831919. The next prime is 13831957. The reversal of 13831938 is 83913831.

It is an interprime number because it is at equal distance from previous prime (13831919) and next prime (13831957).

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

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, 128020 + ... + 128127.

It is an arithmetic number, because the mean of its divisors is an integer number (1921110).

Almost surely, 2^13831938 is an apocalyptic number.

13831938 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

13831938 is an abundant number, since it is smaller than the sum of its proper divisors (16905822).

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

13831938 is a wasteful number, since it uses less digits than its factorization.

13831938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256158 (or 256152 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 13831938 is about 3719.1313501946. The cubic root of 13831938 is about 240.0459287101.

It can be divided in two parts, 1383 and 1938, that added together give a triangular number (3321 = T₈₁).

The spelling of 13831938 in words is "thirteen million, eight hundred thirty-one thousand, nine hundred thirty-eight".