394893 has 24 divisors (see below), whose sum is σ = 631800. Its totient is φ = 236544.

The previous prime is 394879. The next prime is 394897. The reversal of 394893 is 398493.

It can be written as a sum of positive squares in 4 ways, for example, as 56169 + 338724 = 237^2 + 582^2 .

It is not a de Polignac number, because 394893 - 2⁵ = 394861 is a prime.

It is an Ulam number.

394893 is a lucky number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 394893.

It is not an unprimeable number, because it can be changed into a prime (394897) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4393 + ... + 4481.

It is an arithmetic number, because the mean of its divisors is an integer number (26325).

2³⁹⁴⁸⁹³ is an apocalyptic number.

It is an amenable number.

394893 is a deficient number, since it is larger than the sum of its proper divisors (236907).

394893 is a wasteful number, since it uses less digits than its factorization.

394893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141 (or 138 counting only the distinct ones).

The product of its digits is 23328, while the sum is 36.

The square root of 394893 is about 628.4051241039. The cubic root of 394893 is about 73.3657134324.

Subtracting 394893 from its reverse (398493), we obtain a square (3600 = 60²).

The spelling of 394893 in words is "three hundred ninety-four thousand, eight hundred ninety-three".