444207440 has 20 divisors (see below), whose sum is σ = 1032782484. Its totient is φ = 177682944.

The previous prime is 444207431. The next prime is 444207461. The reversal of 444207440 is 44702444.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 206554384 + 237653056 = 14372^2 + 15416^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

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, 2776217 + ... + 2776376.

Almost surely, 2^444207440 is an apocalyptic number.

444207440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

444207440 is an abundant number, since it is smaller than the sum of its proper divisors (588575044).

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

444207440 is a wasteful number, since it uses less digits than its factorization.

444207440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5552606 (or 5552600 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 29.

The square root of 444207440 is about 21076.2292642683. The cubic root of 444207440 is about 763.0071530677.

Adding to 444207440 its reverse (44702444), we get a palindrome (488909884).

The spelling of 444207440 in words is "four hundred forty-four million, two hundred seven thousand, four hundred forty".