1311367320 has 160 divisors (see below), whose sum is σ = 4527190800. Its totient is φ = 340215552.

The previous prime is 1311367319. The next prime is 1311367331. The reversal of 1311367320 is 237631131.

It is a Harshad number since it is a multiple of its sum of digits (27).

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 39 ways as a sum of consecutive naturals, for example, 114411 + ... + 125349.

Almost surely, 2^1311367320 is an apocalyptic number.

1311367320 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 1311367320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2263595400).

1311367320 is an abundant number, since it is smaller than the sum of its proper divisors (3215823480).

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

1311367320 is a wasteful number, since it uses less digits than its factorization.

1311367320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10999 (or 10986 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 27.

The square root of 1311367320 is about 36212.8060221795. The cubic root of 1311367320 is about 1094.5647359934.

Adding to 1311367320 its reverse (237631131), we get a palindrome (1548998451).

The spelling of 1311367320 in words is "one billion, three hundred eleven million, three hundred sixty-seven thousand, three hundred twenty".