1440440232 has 128 divisors (see below), whose sum is σ = 4531507200. Its totient is φ = 370656000.

The previous prime is 1440440213. The next prime is 1440440233. The reversal of 1440440232 is 2320440441.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (1440440233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 197857 + ... + 205007.

It is an arithmetic number, because the mean of its divisors is an integer number (35402400).

Almost surely, 2^1440440232 is an apocalyptic number.

1440440232 is a gapful number since it is divisible by the number (12) 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 1440440232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2265753600).

1440440232 is an abundant number, since it is smaller than the sum of its proper divisors (3091066968).

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

1440440232 is a wasteful number, since it uses less digits than its factorization.

1440440232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7287 (or 7283 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

The square root of 1440440232 is about 37953.1320446679. The cubic root of 1440440232 is about 1129.3582990915.

Adding to 1440440232 its reverse (2320440441), we get a palindrome (3760880673).

The spelling of 1440440232 in words is "one billion, four hundred forty million, four hundred forty thousand, two hundred thirty-two".