131930428 has 12 divisors (see below), whose sum is σ = 263860912. Its totient is φ = 56541600.

The previous prime is 131930413. The next prime is 131930429. The reversal of 131930428 is 824039131.

131930428 is an admirable number.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 131930428.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131930429) 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, 2355873 + ... + 2355928.

Almost surely, 2^131930428 is an apocalyptic number.

It is an amenable number.

131930428 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.

131930428 is a wasteful number, since it uses less digits than its factorization.

131930428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4711812 (or 4711810 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 131930428 is about 11486.0971613512. The cubic root of 131930428 is about 509.0748677575.

Adding to 131930428 its reverse (824039131), we get a palindrome (955969559).

The spelling of 131930428 in words is "one hundred thirty-one million, nine hundred thirty thousand, four hundred twenty-eight".