1144431340 has 96 divisors (see below), whose sum is σ = 2698665984. Its totient is φ = 404801280.

The previous prime is 1144431287. The next prime is 1144431359. The reversal of 1144431340 is 431344411.

1144431340 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

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, 861757 + ... + 863083.

It is an arithmetic number, because the mean of its divisors is an integer number (28111104).

Almost surely, 2^1144431340 is an apocalyptic number.

1144431340 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 1144431340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1349332992).

1144431340 is an abundant number, since it is smaller than the sum of its proper divisors (1554234644).

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

1144431340 is a wasteful number, since it uses less digits than its factorization.

1144431340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1487 (or 1485 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 1144431340 is about 33829.4448668612. Note that the first 3 decimals coincide. The cubic root of 1144431340 is about 1045.9957359619.

Adding to 1144431340 its reverse (431344411), we get a palindrome (1575775751).

The spelling of 1144431340 in words is "one billion, one hundred forty-four million, four hundred thirty-one thousand, three hundred forty".