131438028 has 12 divisors (see below), whose sum is σ = 306688760. Its totient is φ = 43812672.

The previous prime is 131438009. The next prime is 131438071. The reversal of 131438028 is 820834131.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 131437986 and 131438004.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5476573 + ... + 5476596.

Almost surely, 2^131438028 is an apocalyptic number.

It is an amenable number.

131438028 is an abundant number, since it is smaller than the sum of its proper divisors (175250732).

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

131438028 is a wasteful number, since it uses less digits than its factorization.

131438028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10953176 (or 10953174 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 131438028 is about 11464.6425151419. The cubic root of 131438028 is about 508.4407432141.

The spelling of 131438028 in words is "one hundred thirty-one million, four hundred thirty-eight thousand, twenty-eight".