999992128 has 28 divisors (see below), whose sum is σ = 2021806980. Its totient is φ = 490560512.

The previous prime is 999992111. The next prime is 999992129. The reversal of 999992128 is 821299999.

It is a happy number.

999992128 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 680583744 + 319408384 = 26088^2 + 17872^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999992129) 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, 144013 + ... + 150796.

Almost surely, 2^999992128 is an apocalyptic number.

It is an amenable number.

999992128 is an abundant number, since it is smaller than the sum of its proper divisors (1021814852).

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

999992128 is a wasteful number, since it uses less digits than its factorization.

999992128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294874 (or 294864 counting only the distinct ones).

The product of its digits is 1889568, while the sum is 58.

The square root of 999992128 is about 31622.6521341901. The cubic root of 999992128 is about 999.9973759931.

The spelling of 999992128 in words is "nine hundred ninety-nine million, nine hundred ninety-two thousand, one hundred twenty-eight".