1440801240 has 128 divisors (see below), whose sum is σ = 4438368000. Its totient is φ = 374035968.

The previous prime is 1440801227. The next prime is 1440801247. The reversal of 1440801240 is 421080441.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 1440801240.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1440801247) 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, 770787 + ... + 772653.

It is an arithmetic number, because the mean of its divisors is an integer number (34674750).

Almost surely, 2^1440801240 is an apocalyptic number.

1440801240 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 1440801240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2219184000).

1440801240 is an abundant number, since it is smaller than the sum of its proper divisors (2997566760).

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

1440801240 is a wasteful number, since it uses less digits than its factorization.

1440801240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2049 (or 2045 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 24.

The square root of 1440801240 is about 37957.8877178380. The cubic root of 1440801240 is about 1129.4526390755.

Adding to 1440801240 its reverse (421080441), we get a palindrome (1861881681).

The spelling of 1440801240 in words is "one billion, four hundred forty million, eight hundred one thousand, two hundred forty".