131386928 has 20 divisors (see below), whose sum is σ = 262774848. Its totient is φ = 63574080.

The previous prime is 131386921. The next prime is 131386951. The reversal of 131386928 is 829683131.

131386928 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (131386921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131951 + ... + 132942.

Almost surely, 2^131386928 is an apocalyptic number.

It is an amenable number.

131386928 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

131386928 is a wasteful number, since it uses less digits than its factorization.

131386928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264932 (or 264926 counting only the distinct ones).

The product of its digits is 62208, while the sum is 41.

The square root of 131386928 is about 11462.4137074178. The cubic root of 131386928 is about 508.3748447572.

The spelling of 131386928 in words is "one hundred thirty-one million, three hundred eighty-six thousand, nine hundred twenty-eight".