444997280 has 144 divisors (see below), whose sum is σ = 1301577984. Its totient is φ = 140774400.

The previous prime is 444997237. The next prime is 444997303. The reversal of 444997280 is 82799444.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 188105 + ... + 190455.

It is an arithmetic number, because the mean of its divisors is an integer number (9038736).

Almost surely, 2^444997280 is an apocalyptic number.

444997280 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 444997280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (650788992).

444997280 is an abundant number, since it is smaller than the sum of its proper divisors (856580704).

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

444997280 is a wasteful number, since it uses less digits than its factorization.

444997280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2399 (or 2378 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 47.

The square root of 444997280 is about 21094.9586394475. The cubic root of 444997280 is about 763.4591166307.

The spelling of 444997280 in words is "four hundred forty-four million, nine hundred ninety-seven thousand, two hundred eighty".