1313219856 has 80 divisors (see below), whose sum is σ = 3731261184. Its totient is φ = 395461632.

The previous prime is 1313219851. The next prime is 1313219857. The reversal of 1313219856 is 6589123131.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (1313219851) by changing a digit.

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, 6940 + ... + 51716.

Almost surely, 2^1313219856 is an apocalyptic number.

1313219856 is a gapful number since it is divisible by the number (16) 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 1313219856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1865630592).

1313219856 is an abundant number, since it is smaller than the sum of its proper divisors (2418041328).

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

1313219856 is a wasteful number, since it uses less digits than its factorization.

1313219856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44848 (or 44842 counting only the distinct ones).

The product of its digits is 38880, while the sum is 39.

The square root of 1313219856 is about 36238.3754602769. The cubic root of 1313219856 is about 1095.0799149365.

The spelling of 1313219856 in words is "one billion, three hundred thirteen million, two hundred nineteen thousand, eight hundred fifty-six".