444520140 has 24 divisors (see below), whose sum is σ = 1244656560. Its totient is φ = 118538688.

The previous prime is 444520121. The next prime is 444520157. The reversal of 444520140 is 41025444.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 444520140.

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, 3704275 + ... + 3704394.

It is an arithmetic number, because the mean of its divisors is an integer number (51860690).

Almost surely, 2^444520140 is an apocalyptic number.

It is an amenable number.

444520140 is an abundant number, since it is smaller than the sum of its proper divisors (800136420).

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

444520140 is a wasteful number, since it uses less digits than its factorization.

444520140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7408681 (or 7408679 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 24.

The square root of 444520140 is about 21083.6462690873. The cubic root of 444520140 is about 763.1861507998.

Adding to 444520140 its reverse (41025444), we get a palindrome (485545584).

The spelling of 444520140 in words is "four hundred forty-four million, five hundred twenty thousand, one hundred forty".