394906 has 4 divisors (see below), whose sum is σ = 592362. Its totient is φ = 197452.

The previous prime is 394897. The next prime is 394931. The reversal of 394906 is 609493.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 609493 = 29 ⋅21017.

It can be written as a sum of positive squares in only one way, i.e., 370881 + 24025 = 609^2 + 155^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98725 + ... + 98728.

2³⁹⁴⁹⁰⁶ is an apocalyptic number.

394906 is a deficient number, since it is larger than the sum of its proper divisors (197456).

394906 is a wasteful number, since it uses less digits than its factorization.

394906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197455.

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 394906 is about 628.4154676645. The cubic root of 394906 is about 73.3665184976.

The spelling of 394906 in words is "three hundred ninety-four thousand, nine hundred six".