393668 has 24 divisors (see below), whose sum is σ = 786240. Its totient is φ = 170720.

The previous prime is 393667. The next prime is 393671. The reversal of 393668 is 866393.

It is not an unprimeable number, because it can be changed into a prime (393667) 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, 818 + ... + 1206.

It is an arithmetic number, because the mean of its divisors is an integer number (32760).

2³⁹³⁶⁶⁸ is an apocalyptic number.

It is an amenable number.

393668 is a deficient number, since it is larger than the sum of its proper divisors (392572).

393668 is a wasteful number, since it uses less digits than its factorization.

393668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427 (or 425 counting only the distinct ones).

The product of its digits is 23328, while the sum is 35.

The square root of 393668 is about 627.4296773344. The cubic root of 393668 is about 73.2897721088.

It can be divided in two parts, 3936 and 68, that added together give a palindrome (4004).

The spelling of 393668 in words is "three hundred ninety-three thousand, six hundred sixty-eight".