1440022840 has 64 divisors (see below), whose sum is σ = 3373552800. Its totient is φ = 552534528.

The previous prime is 1440022807. The next prime is 1440022861. The reversal of 1440022840 is 482200441.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 178167 + ... + 186073.

Almost surely, 2^1440022840 is an apocalyptic number.

1440022840 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 1440022840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1686776400).

1440022840 is an abundant number, since it is smaller than the sum of its proper divisors (1933529960).

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

1440022840 is a wasteful number, since it uses less digits than its factorization.

1440022840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8104 (or 8100 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 25.

The square root of 1440022840 is about 37947.6328642512. The cubic root of 1440022840 is about 1129.2492049765.

The spelling of 1440022840 in words is "one billion, four hundred forty million, twenty-two thousand, eight hundred forty".