1440001116 has 72 divisors (see below), whose sum is σ = 3868890480. Its totient is φ = 450034176.

The previous prime is 1440001111. The next prime is 1440001117. The reversal of 1440001116 is 6111000441.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1440001111) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 160255 + ... + 169001.

It is an arithmetic number, because the mean of its divisors is an integer number (53734590).

Almost surely, 2^1440001116 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1440001116, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1934445240).

1440001116 is an abundant number, since it is smaller than the sum of its proper divisors (2428889364).

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

1440001116 is a wasteful number, since it uses less digits than its factorization.

1440001116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9043 (or 9038 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 1440001116 is about 37947.3466266088. The cubic root of 1440001116 is about 1129.2435263783.

Adding to 1440001116 its reverse (6111000441), we get a palindrome (7551001557).

The spelling of 1440001116 in words is "one billion, four hundred forty million, one thousand, one hundred sixteen".