999950880 has 384 divisors, whose sum is σ = 3553320960. Its totient is φ = 235192320.

The previous prime is 999950879. The next prime is 999950881. The reversal of 999950880 is 88059999.

It is an interprime number because it is at equal distance from previous prime (999950879) and next prime (999950881).

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 999950880.

It is not an unprimeable number, because it can be changed into a prime (999950881) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 14924607 + ... + 14924673.

It is an arithmetic number, because the mean of its divisors is an integer number (9253440).

Almost surely, 2^999950880 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 999950880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1776660480).

999950880 is an abundant number, since it is smaller than the sum of its proper divisors (2553370080).

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

999950880 is a wasteful number, since it uses less digits than its factorization.

999950880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192 (or 184 counting only the distinct ones).

The product of its (nonzero) digits is 2099520, while the sum is 57.

The square root of 999950880 is about 31621.9999367529. Note that the first 4 decimals coincide. The cubic root of 999950880 is about 999.9836263986.

The spelling of 999950880 in words is "nine hundred ninety-nine million, nine hundred fifty thousand, eight hundred eighty".