1317260880 has 400 divisors, whose sum is σ = 5192584320. Its totient is φ = 306809856.

The previous prime is 1317260851. The next prime is 1317260921. The reversal of 1317260880 is 880627131.

1317260880 is a `hidden beast` number, since 1 + 317 + 260 + 8 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1600149 + ... + 1600971.

Almost surely, 2^1317260880 is an apocalyptic number.

1317260880 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 1317260880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2596292160).

1317260880 is an abundant number, since it is smaller than the sum of its proper divisors (3875323440).

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

1317260880 is a wasteful number, since it uses less digits than its factorization.

1317260880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 880 (or 865 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 1317260880 is about 36294.0887748956. The cubic root of 1317260880 is about 1096.2020202310.

The spelling of 1317260880 in words is "one billion, three hundred seventeen million, two hundred sixty thousand, eight hundred eighty".