317920 has 24 divisors (see below), whose sum is σ = 751464. Its totient is φ = 127104.

The previous prime is 317903. The next prime is 317921. The reversal of 317920 is 29713.

It is a junction number, because it is equal to n+sod(n) for n = 317891 and 317900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (317921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 834 + ... + 1153.

It is an arithmetic number, because the mean of its divisors is an integer number (31311).

2³¹⁷⁹²⁰ is an apocalyptic number.

It is an amenable number.

317920 is an abundant number, since it is smaller than the sum of its proper divisors (433544).

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

317920 is a wasteful number, since it uses less digits than its factorization.

317920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2002 (or 1994 counting only the distinct ones).

The product of its (nonzero) digits is 378, while the sum is 22.

The square root of 317920 is about 563.8439500429. The cubic root of 317920 is about 68.2505176916.

The spelling of 317920 in words is "three hundred seventeen thousand, nine hundred twenty".