1311896320 has 72 divisors (see below), whose sum is σ = 3591340704. Its totient is φ = 449789952.

The previous prime is 1311896303. The next prime is 1311896321. The reversal of 1311896320 is 236981131.

It is not an unprimeable number, because it can be changed into a prime (1311896321) 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 7 ways as a sum of consecutive naturals, for example, 64249 + ... + 82168.

It is an arithmetic number, because the mean of its divisors is an integer number (49879732).

Almost surely, 2^1311896320 is an apocalyptic number.

1311896320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1311896320 is an abundant number, since it is smaller than the sum of its proper divisors (2279444384).

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

1311896320 is an equidigital number, since it uses as much as digits as its factorization.

1311896320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146445 (or 146431 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 1311896320 is about 36220.1093316958. The cubic root of 1311896320 is about 1094.7118971270.

The spelling of 1311896320 in words is "one billion, three hundred eleven million, eight hundred ninety-six thousand, three hundred twenty".