1144232440 has 128 divisors (see below), whose sum is σ = 2939328000. Its totient is φ = 397398528.

The previous prime is 1144232429. The next prime is 1144232461. The reversal of 1144232440 is 442324411.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1768197 + ... + 1768843.

It is an arithmetic number, because the mean of its divisors is an integer number (22963500).

Almost surely, 2^1144232440 is an apocalyptic number.

1144232440 is a gapful number since it is divisible by the number (10) 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 1144232440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1469664000).

1144232440 is an abundant number, since it is smaller than the sum of its proper divisors (1795095560).

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

1144232440 is a wasteful number, since it uses less digits than its factorization.

1144232440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 869 (or 865 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

The square root of 1144232440 is about 33826.5049923873. The cubic root of 1144232440 is about 1045.9351350915.

Adding to 1144232440 its reverse (442324411), we get a palindrome (1586556851).

It can be divided in two parts, 1 and 144232440, that added together give a palindrome (144232441).

The spelling of 1144232440 in words is "one billion, one hundred forty-four million, two hundred thirty-two thousand, four hundred forty".