440044440 has 64 divisors (see below), whose sum is σ = 1440149760. Its totient is φ = 106677120.

The previous prime is 440044433. The next prime is 440044447. The reversal of 440044440 is 44440044.

It is an interprime number because it is at equal distance from previous prime (440044433) and next prime (440044447).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 440044440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (440044447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 165364 + ... + 168003.

It is an arithmetic number, because the mean of its divisors is an integer number (22502340).

Almost surely, 2^440044440 is an apocalyptic number.

440044440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

440044440 is an abundant number, since it is smaller than the sum of its proper divisors (1000105320).

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

440044440 is a wasteful number, since it uses less digits than its factorization.

440044440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333392 (or 333388 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 24.

The square root of 440044440 is about 20977.2362335938. The cubic root of 440044440 is about 760.6160978368.

Adding to 440044440 its reverse (44440044), we get a palindrome (484484484).

The spelling of 440044440 in words is "four hundred forty million, forty-four thousand, four hundred forty".