131439768 has 64 divisors (see below), whose sum is σ = 338688000. Its totient is φ = 42481920.

The previous prime is 131439761. The next prime is 131439797. The reversal of 131439768 is 867934131.

It is a super-2 number, since 2×131439768² = 34552825223787648, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131439761) 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, 219133 + ... + 219731.

It is an arithmetic number, because the mean of its divisors is an integer number (5292000).

Almost surely, 2^131439768 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 131439768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (169344000).

131439768 is an abundant number, since it is smaller than the sum of its proper divisors (207248232).

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

131439768 is a wasteful number, since it uses less digits than its factorization.

131439768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 872 (or 868 counting only the distinct ones).

The product of its digits is 108864, while the sum is 42.

The square root of 131439768 is about 11464.7184003795. The cubic root of 131439768 is about 508.4429868139.

The spelling of 131439768 in words is "one hundred thirty-one million, four hundred thirty-nine thousand, seven hundred sixty-eight".