131839638 has 32 divisors (see below), whose sum is σ = 301733376. Its totient is φ = 37620288.

The previous prime is 131839637. The next prime is 131839639. The reversal of 131839638 is 836938131.

It is an interprime number because it is at equal distance from previous prime (131839637) and next prime (131839639).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 131839638.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131839633) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43170 + ... + 46122.

It is an arithmetic number, because the mean of its divisors is an integer number (9429168).

Almost surely, 2^131839638 is an apocalyptic number.

131839638 is an abundant number, since it is smaller than the sum of its proper divisors (169893738).

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

131839638 is a wasteful number, since it uses less digits than its factorization.

131839638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4028.

The product of its digits is 93312, while the sum is 42.

The square root of 131839638 is about 11482.1443119306. The cubic root of 131839638 is about 508.9580650000.

The spelling of 131839638 in words is "one hundred thirty-one million, eight hundred thirty-nine thousand, six hundred thirty-eight".