999444996 has 81 divisors (see below), whose sum is σ = 2782733863. Its totient is φ = 302229840.

The previous prime is 999444983. The next prime is 999444997. The reversal of 999444996 is 699444999.

The square root of 999444996 is 31614.

It is a perfect power (a square), and thus also a powerful number.

It is a nude number because it is divisible by every one of its digits.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (999444997) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 2086285 + ... + 2086763.

Almost surely, 2^999444996 is an apocalyptic number.

999444996 is the 31614-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 999444996

999444996 is an abundant number, since it is smaller than the sum of its proper divisors (1783288867).

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

999444996 is a wasteful number, since it uses less digits than its factorization.

999444996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 990 (or 495 counting only the distinct ones).

The product of its digits is 22674816, while the sum is 63.

The cubic root of 999444996 is about 999.8149644306.

The spelling of 999444996 in words is "nine hundred ninety-nine million, four hundred forty-four thousand, nine hundred ninety-six".