999999000444 has 96 divisors (see below), whose sum is σ = 2486664423936. Its totient is φ = 312319445760.

The previous prime is 999999000397. The next prime is 999999000461. The reversal of 999999000444 is 444000999999.

It is a super-2 number, since 2×999999000444² (a number of 25 digits) contains 22 as substring.

It is a zygodrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 986674 + ... + 1724390.

It is an arithmetic number, because the mean of its divisors is an integer number (25902754416).

Almost surely, 2^999999000444 is an apocalyptic number.

It is an amenable number.

999999000444 is an abundant number, since it is smaller than the sum of its proper divisors (1486665423492).

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

999999000444 is a wasteful number, since it uses less digits than its factorization.

999999000444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 737875 (or 737873 counting only the distinct ones).

The product of its (nonzero) digits is 34012224, while the sum is 66.

The spelling of 999999000444 in words is "nine hundred ninety-nine billion, nine hundred ninety-nine million, four hundred forty-four", and thus it is an aban number.