1311278360 has 64 divisors (see below), whose sum is σ = 3376987200. Its totient is φ = 448897536.

The previous prime is 1311278347. The next prime is 1311278383. The reversal of 1311278360 is 638721131.

1311278360 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 202046 + ... + 208434.

It is an arithmetic number, because the mean of its divisors is an integer number (52765425).

Almost surely, 2^1311278360 is an apocalyptic number.

1311278360 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1311278360 is an abundant number, since it is smaller than the sum of its proper divisors (2065708840).

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

1311278360 is a wasteful number, since it uses less digits than its factorization.

1311278360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7140 (or 7136 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 1311278360 is about 36211.5777065844. The cubic root of 1311278360 is about 1094.5399845554.

Adding to 1311278360 its reverse (638721131), we get a palindrome (1949999491).

The spelling of 1311278360 in words is "one billion, three hundred eleven million, two hundred seventy-eight thousand, three hundred sixty".