1313324240 has 20 divisors (see below), whose sum is σ = 3053479044. Its totient is φ = 525329664.

The previous prime is 1313324237. The next prime is 1313324291. The reversal of 1313324240 is 424233131.

It can be written as a sum of positive squares in 2 ways, for example, as 551122576 + 762201664 = 23476^2 + 27608^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8208197 + ... + 8208356.

Almost surely, 2^1313324240 is an apocalyptic number.

1313324240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1313324240 is an abundant number, since it is smaller than the sum of its proper divisors (1740154804).

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

1313324240 is a wasteful number, since it uses less digits than its factorization.

1313324240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16416566 (or 16416560 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 1313324240 is about 36239.8156728204. The cubic root of 1313324240 is about 1095.1089290661.

Adding to 1313324240 its reverse (424233131), we get a palindrome (1737557371).

It can be divided in two parts, 13133 and 24240, that added together give a palindrome (37373).

The spelling of 1313324240 in words is "one billion, three hundred thirteen million, three hundred twenty-four thousand, two hundred forty".