1440911808 has 224 divisors, whose sum is σ = 4881676800. Its totient is φ = 408250368.

The previous prime is 1440911803. The next prime is 1440911821. The reversal of 1440911808 is 8081190441.

It is a tau number, because it is divible by the number of its divisors (224).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1440911803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1680916 + ... + 1681772.

It is an arithmetic number, because the mean of its divisors is an integer number (21793200).

Almost surely, 2^1440911808 is an apocalyptic number.

1440911808 is a gapful number since it is divisible by the number (18) 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 1440911808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2440838400).

1440911808 is an abundant number, since it is smaller than the sum of its proper divisors (3440764992).

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

1440911808 is a wasteful number, since it uses less digits than its factorization.

1440911808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1024 (or 1008 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 36.

The square root of 1440911808 is about 37959.3441460729. The cubic root of 1440911808 is about 1129.4815299735.

The spelling of 1440911808 in words is "one billion, four hundred forty million, nine hundred eleven thousand, eight hundred eight".