393866 has 8 divisors (see below), whose sum is σ = 644544. Its totient is φ = 179020.

The previous prime is 393863. The next prime is 393871. The reversal of 393866 is 668393.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (393863) 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, 8930 + ... + 8973.

It is an arithmetic number, because the mean of its divisors is an integer number (80568).

2³⁹³⁸⁶⁶ is an apocalyptic number.

393866 is a deficient number, since it is larger than the sum of its proper divisors (250678).

393866 is a wasteful number, since it uses less digits than its factorization.

393866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17916.

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

The square root of 393866 is about 627.5874441064. The cubic root of 393866 is about 73.3020573701.

It can be divided in two parts, 3938 and 66, that added together give a palindrome (4004).

The spelling of 393866 in words is "three hundred ninety-three thousand, eight hundred sixty-six".