1440816340 has 24 divisors (see below), whose sum is σ = 3075318792. Its totient is φ = 566878080.

The previous prime is 1440816281. The next prime is 1440816343. The reversal of 1440816340 is 436180441.

It can be written as a sum of positive squares in 4 ways, for example, as 158404 + 1440657936 = 398^2 + 37956^2 .

It is a super-2 number, since 2×1440816340² = 4151903451221991200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1440816343) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 589279 + ... + 591718.

It is an arithmetic number, because the mean of its divisors is an integer number (128138283).

Almost surely, 2^1440816340 is an apocalyptic number.

1440816340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1440816340 is an abundant number, since it is smaller than the sum of its proper divisors (1634502452).

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

1440816340 is a wasteful number, since it uses less digits than its factorization.

1440816340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1181067 (or 1181065 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 1440816340 is about 37958.0866219571. The cubic root of 1440816340 is about 1129.4565847216.

Adding to 1440816340 its reverse (436180441), we get a palindrome (1876996781).

The spelling of 1440816340 in words is "one billion, four hundred forty million, eight hundred sixteen thousand, three hundred forty".