131395638 has 32 divisors (see below), whose sum is σ = 287089920. Its totient is φ = 39760160.

The previous prime is 131395637. The next prime is 131395657. The reversal of 131395638 is 836593131.

It is a junction number, because it is equal to n+sod(n) for n = 131395596 and 131395605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131395633) 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, 83503 + ... + 85061.

It is an arithmetic number, because the mean of its divisors is an integer number (8971560).

Almost surely, 2^131395638 is an apocalyptic number.

131395638 is an abundant number, since it is smaller than the sum of its proper divisors (155694282).

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

131395638 is a wasteful number, since it uses less digits than its factorization.

131395638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2852.

The product of its digits is 58320, while the sum is 39.

The square root of 131395638 is about 11462.7936385508. The cubic root of 131395638 is about 508.3860783634.

The spelling of 131395638 in words is "one hundred thirty-one million, three hundred ninety-five thousand, six hundred thirty-eight".