440231440 has 80 divisors (see below), whose sum is σ = 1124320896. Its totient is φ = 158976000.

The previous prime is 440231423. The next prime is 440231443. The reversal of 440231440 is 44132044.

It is a tau number, because it is divible by the number of its divisors (80).

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 (440231443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 131224 + ... + 134536.

Almost surely, 2^440231440 is an apocalyptic number.

440231440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 440231440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (562160448).

440231440 is an abundant number, since it is smaller than the sum of its proper divisors (684089456).

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

440231440 is a wasteful number, since it uses less digits than its factorization.

440231440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3488 (or 3482 counting only the distinct ones).

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

The square root of 440231440 is about 20981.6929726845. The cubic root of 440231440 is about 760.7238256435.

Adding to 440231440 its reverse (44132044), we get a palindrome (484363484).

The spelling of 440231440 in words is "four hundred forty million, two hundred thirty-one thousand, four hundred forty".