100131928 has 16 divisors (see below), whose sum is σ = 202189680. Its totient is φ = 46214688.

The previous prime is 100131917. The next prime is 100131929. The reversal of 100131928 is 829131001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100131929) 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, 481300 + ... + 481507.

It is an arithmetic number, because the mean of its divisors is an integer number (12636855).

Almost surely, 2^100131928 is an apocalyptic number.

It is an amenable number.

100131928 is an abundant number, since it is smaller than the sum of its proper divisors (102057752).

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

100131928 is a wasteful number, since it uses less digits than its factorization.

100131928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 962826 (or 962822 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 25.

The square root of 100131928 is about 10006.5942258093. The cubic root of 100131928 is about 464.3629121744.

Adding to 100131928 its reverse (829131001), we get a palindrome (929262929).

The spelling of 100131928 in words is "one hundred million, one hundred thirty-one thousand, nine hundred twenty-eight".