1340213544 has 96 divisors (see below), whose sum is σ = 3723450120. Its totient is φ = 435322368.

The previous prime is 1340213419. The next prime is 1340213549. The reversal of 1340213544 is 4453120431.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1272348900 + 67864644 = 35670^2 + 8238^2 .

It is not an unprimeable number, because it can be changed into a prime (1340213549) 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 23 ways as a sum of consecutive naturals, for example, 597994 + ... + 600230.

Almost surely, 2^1340213544 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1340213544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1861725060).

1340213544 is an abundant number, since it is smaller than the sum of its proper divisors (2383236576).

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

1340213544 is a wasteful number, since it uses less digits than its factorization.

1340213544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2459 (or 2452 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 1340213544 is about 36608.9271080156. The cubic root of 1340213544 is about 1102.5323321846.

Adding to 1340213544 its reverse (4453120431), we get a palindrome (5793333975).

The spelling of 1340213544 in words is "one billion, three hundred forty million, two hundred thirteen thousand, five hundred forty-four".