999445568 has 56 divisors (see below), whose sum is σ = 2176784064. Its totient is φ = 451520000.

The previous prime is 999445567. The next prime is 999445597. The reversal of 999445568 is 865544999.

It is not an unprimeable number, because it can be changed into a prime (999445567) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113318 + ... + 121818.

It is an arithmetic number, because the mean of its divisors is an integer number (38871144).

Almost surely, 2^999445568 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 999445568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1088392032).

999445568 is an abundant number, since it is smaller than the sum of its proper divisors (1177338496).

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

999445568 is a wasteful number, since it uses less digits than its factorization.

999445568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8691 (or 8681 counting only the distinct ones).

The product of its digits is 13996800, while the sum is 59.

The square root of 999445568 is about 31614.0090466236. The cubic root of 999445568 is about 999.8151551678.

The spelling of 999445568 in words is "nine hundred ninety-nine million, four hundred forty-five thousand, five hundred sixty-eight".