999999944 has 32 divisors (see below), whose sum is σ = 1980084000. Its totient is φ = 472148352.

The previous prime is 999999937. The next prime is 1000000007. The reversal of 999999944 is 449999999.

It is a nialpdrome in base 10.

It is a zygodrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37067 + ... + 58085.

It is an arithmetic number, because the mean of its divisors is an integer number (61877625).

Almost surely, 2^999999944 is an apocalyptic number.

It is an amenable number.

999999944 is a deficient number, since it is larger than the sum of its proper divisors (980084056).

999999944 is a wasteful number, since it uses less digits than its factorization.

999999944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21357 (or 21353 counting only the distinct ones).

The product of its digits is 76527504, while the sum is 71.

The square root of 999999944 is about 31622.7757162460. The cubic root of 999999944 is about 999.9999813333. Note that the first 4 decimals are identical.

Subtracting from 999999944 its reverse (449999999), we obtain a palindrome (549999945).

The spelling of 999999944 in words is "nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred forty-four".