317809086 has 128 divisors (see below), whose sum is σ = 818380800. Its totient is φ = 80196480.

The previous prime is 317809049. The next prime is 317809091. The reversal of 317809086 is 680908713.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 717181 + ... + 717623.

It is an arithmetic number, because the mean of its divisors is an integer number (6393600).

Almost surely, 2^317809086 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 317809086, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (409190400).

317809086 is an abundant number, since it is smaller than the sum of its proper divisors (500571714).

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

317809086 is a wasteful number, since it uses less digits than its factorization.

317809086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534.

The product of its (nonzero) digits is 72576, while the sum is 42.

The square root of 317809086 is about 17827.2007337103. The cubic root of 317809086 is about 682.4257982635.

The spelling of 317809086 in words is "three hundred seventeen million, eight hundred nine thousand, eighty-six".