1316886780 has 96 divisors (see below), whose sum is σ = 4047499008. Its totient is φ = 317260800.

The previous prime is 1316886733. The next prime is 1316886871. The reversal of 1316886780 is 876886131.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 101460 + ... + 113700.

It is an arithmetic number, because the mean of its divisors is an integer number (42161448).

Almost surely, 2^1316886780 is an apocalyptic number.

1316886780 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 1316886780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2023749504).

1316886780 is an abundant number, since it is smaller than the sum of its proper divisors (2730612228).

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

1316886780 is a wasteful number, since it uses less digits than its factorization.

1316886780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12427 (or 12425 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 48.

The square root of 1316886780 is about 36288.9346771161. The cubic root of 1316886780 is about 1096.0982371941.

The spelling of 1316886780 in words is "one billion, three hundred sixteen million, eight hundred eighty-six thousand, seven hundred eighty".