444399285920 has 48 divisors (see below), whose sum is σ = 1050198320808. Its totient is φ = 177708072960.

The previous prime is 444399285901. The next prime is 444399285971. The reversal of 444399285920 is 29582993444.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 366707758096 + 77691527824 = 605564^2 + 278732^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 444399285920.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 151400 + ... + 954840.

Almost surely, 2^444399285920 is an apocalyptic number.

444399285920 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

444399285920 is an abundant number, since it is smaller than the sum of its proper divisors (605799034888).

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

444399285920 is a wasteful number, since it uses less digits than its factorization.

444399285920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 806913 (or 806905 counting only the distinct ones).

The product of its (nonzero) digits is 22394880, while the sum is 59.

The spelling of 444399285920 in words is "four hundred forty-four billion, three hundred ninety-nine million, two hundred eighty-five thousand, nine hundred twenty".