999928020030 has 64 divisors (see below), whose sum is σ = 2435089704768. Its totient is φ = 262736593920.

The previous prime is 999928020017. The next prime is 999928020031. The reversal of 999928020030 is 30020829999.

It is a super-2 number, since 2×999928020030² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999928020031) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2012392 + ... + 2459588.

It is an arithmetic number, because the mean of its divisors is an integer number (38048276637).

Almost surely, 2^999928020030 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 999928020030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1217544852384).

999928020030 is an abundant number, since it is smaller than the sum of its proper divisors (1435161684738).

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

999928020030 is a wasteful number, since it uses less digits than its factorization.

999928020030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448301.

The product of its (nonzero) digits is 629856, while the sum is 51.

The spelling of 999928020030 in words is "nine hundred ninety-nine billion, nine hundred twenty-eight million, twenty thousand, thirty".