999822020 has 48 divisors (see below), whose sum is σ = 2231203968. Its totient is φ = 375037440.

The previous prime is 999822007. The next prime is 999822041. The reversal of 999822020 is 20228999.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91025 + ... + 101415.

It is an arithmetic number, because the mean of its divisors is an integer number (46483416).

Almost surely, 2^999822020 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 999822020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1115601984).

999822020 is an abundant number, since it is smaller than the sum of its proper divisors (1231381948).

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

999822020 is a wasteful number, since it uses less digits than its factorization.

999822020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10700 (or 10698 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 41.

The square root of 999822020 is about 31619.9623655690. The cubic root of 999822020 is about 999.9406698133.

The spelling of 999822020 in words is "nine hundred ninety-nine million, eight hundred twenty-two thousand, twenty".