999828999 has 24 divisors (see below), whose sum is σ = 1556554272. Its totient is φ = 614779200.

The previous prime is 999828989. The next prime is 999829003.

999828999 is nontrivially palindromic in base 10.

999828999 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 999828999 - 2⁴ = 999828983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999828989) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 184174 + ... + 189524.

It is an arithmetic number, because the mean of its divisors is an integer number (64856428).

Almost surely, 2^999828999 is an apocalyptic number.

999828999 is a deficient number, since it is larger than the sum of its proper divisors (556725273).

999828999 is a wasteful number, since it uses less digits than its factorization.

999828999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6967 (or 6964 counting only the distinct ones).

The product of its digits is 68024448, while the sum is 72.

The square root of 999828999 is about 31620.0727228765. The cubic root of 999828999 is about 999.9429964173.

The spelling of 999828999 in words is "nine hundred ninety-nine million, eight hundred twenty-eight thousand, nine hundred ninety-nine".