1440043242 has 64 divisors (see below), whose sum is σ = 3333052800. Its totient is φ = 409927680.

The previous prime is 1440043237. The next prime is 1440043243. The reversal of 1440043242 is 2423400441.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1440043243) 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, 861984 + ... + 863652.

It is an arithmetic number, because the mean of its divisors is an integer number (52078950).

Almost surely, 2^1440043242 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1440043242, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1666526400).

1440043242 is an abundant number, since it is smaller than the sum of its proper divisors (1893009558).

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

1440043242 is a wasteful number, since it uses less digits than its factorization.

1440043242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2471.

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

The square root of 1440043242 is about 37947.9016811207. The cubic root of 1440043242 is about 1129.2545379552.

Adding to 1440043242 its reverse (2423400441), we get a palindrome (3863443683).

The spelling of 1440043242 in words is "one billion, four hundred forty million, forty-three thousand, two hundred forty-two".