440320144 has 20 divisors (see below), whose sum is σ = 930677040. Its totient is φ = 200145440.

The previous prime is 440320141. The next prime is 440320171. The reversal of 440320144 is 441023044.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (440320141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1250734 + ... + 1251085.

It is an arithmetic number, because the mean of its divisors is an integer number (46533852).

Almost surely, 2^440320144 is an apocalyptic number.

440320144 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

440320144 is an abundant number, since it is smaller than the sum of its proper divisors (490356896).

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

440320144 is a wasteful number, since it uses less digits than its factorization.

440320144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2501838 (or 2501832 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 440320144 is about 20983.8067089840. The cubic root of 440320144 is about 760.7749159779.

Adding to 440320144 its reverse (441023044), we get a palindrome (881343188).

The spelling of 440320144 in words is "four hundred forty million, three hundred twenty thousand, one hundred forty-four".