317888140 has 24 divisors (see below), whose sum is σ = 690585840. Its totient is φ = 122770368.

The previous prime is 317888113. The next prime is 317888143. The reversal of 317888140 is 41888713.

It is a junction number, because it is equal to n+sod(n) for n = 317888093 and 317888102.

It is not an unprimeable number, because it can be changed into a prime (317888143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 273462 + ... + 274621.

It is an arithmetic number, because the mean of its divisors is an integer number (28774410).

Almost surely, 2^317888140 is an apocalyptic number.

It is an amenable number.

317888140 is an abundant number, since it is smaller than the sum of its proper divisors (372697700).

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

317888140 is a wasteful number, since it uses less digits than its factorization.

317888140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 548121 (or 548119 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 40.

The square root of 317888140 is about 17829.4178256050. The cubic root of 317888140 is about 682.4823773219.

The spelling of 317888140 in words is "three hundred seventeen million, eight hundred eighty-eight thousand, one hundred forty".