440444240 has 40 divisors (see below), whose sum is σ = 1038469248. Its totient is φ = 173694080.

The previous prime is 440444239. The next prime is 440444243. The reversal of 440444240 is 42444044.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×440444240² = 387982257098355200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (440444243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33092 + ... + 44451.

Almost surely, 2^440444240 is an apocalyptic number.

440444240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

440444240 is an abundant number, since it is smaller than the sum of its proper divisors (598025008).

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

440444240 is a wasteful number, since it uses less digits than its factorization.

440444240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77627 (or 77621 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 26.

The square root of 440444240 is about 20986.7634474685. The cubic root of 440444240 is about 760.8463793268.

Adding to 440444240 its reverse (42444044), we get a palindrome (482888284).

It can be divided in two parts, 44044 and 4240, that added together give a palindrome (48284).

The spelling of 440444240 in words is "four hundred forty million, four hundred forty-four thousand, two hundred forty".