317238540 has 96 divisors (see below), whose sum is σ = 958970880. Its totient is φ = 78118656.

The previous prime is 317238527. The next prime is 317238541. The reversal of 317238540 is 45832713.

It is a super-2 number, since 2×317238540² = 201280582522663200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (317238541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36057 + ... + 43983.

It is an arithmetic number, because the mean of its divisors is an integer number (9989280).

Almost surely, 2^317238540 is an apocalyptic number.

317238540 is a gapful number since it is divisible by the number (30) 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 317238540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (479485440).

317238540 is an abundant number, since it is smaller than the sum of its proper divisors (641732340).

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

317238540 is a wasteful number, since it uses less digits than its factorization.

317238540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7991 (or 7989 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 317238540 is about 17811.1914256178. The cubic root of 317238540 is about 682.0171792154.

The spelling of 317238540 in words is "three hundred seventeen million, two hundred thirty-eight thousand, five hundred forty".