999221444 has 96 divisors (see below), whose sum is σ = 2068932096. Its totient is φ = 418037760.

The previous prime is 999221429. The next prime is 999221449. The reversal of 999221444 is 444122999.

It is a junction number, because it is equal to n+sod(n) for n = 999221395 and 999221404.

It is not an unprimeable number, because it can be changed into a prime (999221449) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3687029 + ... + 3687299.

It is an arithmetic number, because the mean of its divisors is an integer number (21551376).

Almost surely, 2^999221444 is an apocalyptic number.

It is an amenable number.

999221444 is an abundant number, since it is smaller than the sum of its proper divisors (1069710652).

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

999221444 is a wasteful number, since it uses less digits than its factorization.

999221444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 445 (or 443 counting only the distinct ones).

The product of its digits is 186624, while the sum is 44.

The square root of 999221444 is about 31610.4641535046. The cubic root of 999221444 is about 999.7404139542.

The spelling of 999221444 in words is "nine hundred ninety-nine million, two hundred twenty-one thousand, four hundred forty-four".