444004520 has 16 divisors (see below), whose sum is σ = 999010260. Its totient is φ = 177601792.

The previous prime is 444004513. The next prime is 444004579. The reversal of 444004520 is 25400444.

It can be written as a sum of positive squares in 2 ways, for example, as 389746564 + 54257956 = 19742^2 + 7366^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5550017 + ... + 5550096.

Almost surely, 2^444004520 is an apocalyptic number.

444004520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

444004520 is an abundant number, since it is smaller than the sum of its proper divisors (555005740).

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

444004520 is a wasteful number, since it uses less digits than its factorization.

444004520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11100124 (or 11100120 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 23.

The square root of 444004520 is about 21071.4147602860. The cubic root of 444004520 is about 762.8909513569.

Adding to 444004520 its reverse (25400444), we get a palindrome (469404964).

The spelling of 444004520 in words is "four hundred forty-four million, four thousand, five hundred twenty".