999930880 has 176 divisors, whose sum is σ = 2628741024. Its totient is φ = 362741760.

The previous prime is 999930857. The next prime is 999930889. The reversal of 999930880 is 88039999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999930889) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5524390 + ... + 5524570.

Almost surely, 2^999930880 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 999930880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1314370512).

999930880 is an abundant number, since it is smaller than the sum of its proper divisors (1628810144).

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

999930880 is a wasteful number, since it uses less digits than its factorization.

999930880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302 (or 284 counting only the distinct ones).

The product of its (nonzero) digits is 1259712, while the sum is 55.

The square root of 999930880 is about 31621.6836996388. The cubic root of 999930880 is about 999.9769594691.

The spelling of 999930880 in words is "nine hundred ninety-nine million, nine hundred thirty thousand, eight hundred eighty".