999641928 has 16 divisors (see below), whose sum is σ = 2499104880. Its totient is φ = 333213968.

The previous prime is 999641911. The next prime is 999641933. The reversal of 999641928 is 829146999.

999641928 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 20825850 + ... + 20825897.

It is an arithmetic number, because the mean of its divisors is an integer number (156194055).

Almost surely, 2^999641928 is an apocalyptic number.

It is an amenable number.

999641928 is an abundant number, since it is smaller than the sum of its proper divisors (1499462952).

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

999641928 is a wasteful number, since it uses less digits than its factorization.

999641928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41651756 (or 41651752 counting only the distinct ones).

The product of its digits is 2519424, while the sum is 57.

The square root of 999641928 is about 31617.1144793449. The cubic root of 999641928 is about 999.8806284177.

The spelling of 999641928 in words is "nine hundred ninety-nine million, six hundred forty-one thousand, nine hundred twenty-eight".