440242440 has 64 divisors (see below), whose sum is σ = 1440797760. Its totient is φ = 106725120.

The previous prime is 440242423. The next prime is 440242447. The reversal of 440242440 is 44242044.

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 440242440.

It is not an unprimeable number, because it can be changed into a prime (440242447) 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, 165439 + ... + 168078.

It is an arithmetic number, because the mean of its divisors is an integer number (22512465).

Almost surely, 2^440242440 is an apocalyptic number.

440242440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

440242440 is an abundant number, since it is smaller than the sum of its proper divisors (1000555320).

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

440242440 is a wasteful number, since it uses less digits than its factorization.

440242440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333542 (or 333538 counting only the distinct ones).

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

The square root of 440242440 is about 20981.9551043271. The cubic root of 440242440 is about 760.7301616232.

Adding to 440242440 its reverse (44242044), we get a palindrome (484484484).

It can be divided in two parts, 44024 and 2440, that added together give a palindrome (46464).

The spelling of 440242440 in words is "four hundred forty million, two hundred forty-two thousand, four hundred forty".