444424520 has 16 divisors (see below), whose sum is σ = 999955260. Its totient is φ = 177769792.

The previous prime is 444424517. The next prime is 444424577. The reversal of 444424520 is 25424444.

It can be written as a sum of positive squares in 2 ways, for example, as 382046116 + 62378404 = 19546^2 + 7898^2 .

It is a super-3 number, since 3×444424520³ (a number of 27 digits) contains 333 as substring.

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, 5555267 + ... + 5555346.

Almost surely, 2^444424520 is an apocalyptic number.

444424520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

444424520 is an abundant number, since it is smaller than the sum of its proper divisors (555530740).

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

444424520 is a wasteful number, since it uses less digits than its factorization.

444424520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11110624 (or 11110620 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 29.

The square root of 444424520 is about 21081.3785128013. The cubic root of 444424520 is about 763.1314243008.

Adding to 444424520 its reverse (25424444), we get a palindrome (469848964).

The spelling of 444424520 in words is "four hundred forty-four million, four hundred twenty-four thousand, five hundred twenty".