317490840 has 320 divisors, whose sum is σ = 1149984000. Its totient is φ = 78382080.

The previous prime is 317490791. The next prime is 317490841. The reversal of 317490840 is 48094713.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 317490795 and 317490804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (317490841) 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 79 ways as a sum of consecutive naturals, for example, 2912706 + ... + 2912814.

It is an arithmetic number, because the mean of its divisors is an integer number (3593700).

Almost surely, 2^317490840 is an apocalyptic number.

317490840 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 317490840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (574992000).

317490840 is an abundant number, since it is smaller than the sum of its proper divisors (832493160).

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

317490840 is a wasteful number, since it uses less digits than its factorization.

317490840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192 (or 179 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 317490840 is about 17818.2726435533. The cubic root of 317490840 is about 682.1979341954.

The spelling of 317490840 in words is "three hundred seventeen million, four hundred ninety thousand, eight hundred forty".