1440023340 has 96 divisors (see below), whose sum is σ = 4683700224. Its totient is φ = 323746560.

The previous prime is 1440023339. The next prime is 1440023341. The reversal of 1440023340 is 433200441.

It is an interprime number because it is at equal distance from previous prime (1440023339) and next prime (1440023341).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (1440023341) 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, 2484 + ... + 53723.

It is an arithmetic number, because the mean of its divisors is an integer number (48788544).

Almost surely, 2^1440023340 is an apocalyptic number.

1440023340 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 1440023340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2341850112).

1440023340 is an abundant number, since it is smaller than the sum of its proper divisors (3243676884).

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

1440023340 is a wasteful number, since it uses less digits than its factorization.

1440023340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56287 (or 56285 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 1440023340 is about 37947.6394522769. The cubic root of 1440023340 is about 1129.2493356745.

Adding to 1440023340 its reverse (433200441), we get a palindrome (1873223781).

The spelling of 1440023340 in words is "one billion, four hundred forty million, twenty-three thousand, three hundred forty".