100921928 has 16 divisors (see below), whose sum is σ = 200359980. Its totient is φ = 47492608.

The previous prime is 100921921. The next prime is 100921949. The reversal of 100921928 is 829129001.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 97970404 + 2951524 = 9898^2 + 1718^2 .

It is a junction number, because it is equal to n+sod(n) for n = 100921894 and 100921903.

It is not an unprimeable number, because it can be changed into a prime (100921921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 370901 + ... + 371172.

Almost surely, 2^100921928 is an apocalyptic number.

It is an amenable number.

100921928 is a deficient number, since it is larger than the sum of its proper divisors (99438052).

100921928 is a wasteful number, since it uses less digits than its factorization.

100921928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 742096 (or 742092 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 32.

The square root of 100921928 is about 10045.9906430376. The cubic root of 100921928 is about 465.5809257743.

The spelling of 100921928 in words is "one hundred million, nine hundred twenty-one thousand, nine hundred twenty-eight".