393318 has 12 divisors (see below), whose sum is σ = 852228. Its totient is φ = 131100.

The previous prime is 393311. The next prime is 393331. The reversal of 393318 is 813393.

It is a junction number, because it is equal to n+sod(n) for n = 393291 and 393300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (393311) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10908 + ... + 10943.

It is an arithmetic number, because the mean of its divisors is an integer number (71019).

2³⁹³³¹⁸ is an apocalyptic number.

393318 is an abundant number, since it is smaller than the sum of its proper divisors (458910).

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

393318 is a wasteful number, since it uses less digits than its factorization.

393318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21859 (or 21856 counting only the distinct ones).

The product of its digits is 1944, while the sum is 27.

The square root of 393318 is about 627.1506995930. The cubic root of 393318 is about 73.2680456574.

The spelling of 393318 in words is "three hundred ninety-three thousand, three hundred eighteen".