1144043940 has 96 divisors (see below), whose sum is σ = 3477196800. Its totient is φ = 279369216.

The previous prime is 1144043911. The next prime is 1144043947. The reversal of 1144043940 is 493404411.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 1144043898 and 1144043907.

It is not an unprimeable number, because it can be changed into a prime (1144043947) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 93286 + ... + 104834.

It is an arithmetic number, because the mean of its divisors is an integer number (36220800).

Almost surely, 2^1144043940 is an apocalyptic number.

1144043940 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 1144043940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1738598400).

1144043940 is an abundant number, since it is smaller than the sum of its proper divisors (2333152860).

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

1144043940 is a wasteful number, since it uses less digits than its factorization.

1144043940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11701 (or 11699 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 1144043940 is about 33823.7186010054. The cubic root of 1144043940 is about 1045.8776964122.

The spelling of 1144043940 in words is "one billion, one hundred forty-four million, forty-three thousand, nine hundred forty".