317985108 has 72 divisors (see below), whose sum is σ = 865670400. Its totient is φ = 90582912.

The previous prime is 317985103. The next prime is 317985113. The reversal of 317985108 is 801589713.

It is an interprime number because it is at equal distance from previous prime (317985103) and next prime (317985113).

It is a super-2 number, since 2×317985108² = 202229057819543328, which contains 22 as substring.

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

It is a self number, because there is not a number n which added to its sum of digits gives 317985108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (317985103) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 281088 + ... + 282216.

It is an arithmetic number, because the mean of its divisors is an integer number (12023200).

Almost surely, 2^317985108 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 317985108, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (432835200).

317985108 is an abundant number, since it is smaller than the sum of its proper divisors (547685292).

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

317985108 is a wasteful number, since it uses less digits than its factorization.

317985108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1629 (or 1620 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 42.

The square root of 317985108 is about 17832.1369442925. The cubic root of 317985108 is about 682.5517646471.

The spelling of 317985108 in words is "three hundred seventeen million, nine hundred eighty-five thousand, one hundred eight".