394445 has 4 divisors (see below), whose sum is σ = 473340. Its totient is φ = 315552.

The previous prime is 394411. The next prime is 394453. The reversal of 394445 is 544493.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 544493 = 17 ⋅32029.

It can be written as a sum of positive squares in 2 ways, for example, as 47524 + 346921 = 218^2 + 589^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-394445 is a prime.

It is a Curzon 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 394445.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39440 + ... + 39449.

It is an arithmetic number, because the mean of its divisors is an integer number (118335).

2³⁹⁴⁴⁴⁵ is an apocalyptic number.

It is an amenable number.

394445 is a deficient number, since it is larger than the sum of its proper divisors (78895).

394445 is an equidigital number, since it uses as much as digits as its factorization.

394445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78894.

The product of its digits is 8640, while the sum is 29.

The square root of 394445 is about 628.0485650011. The cubic root of 394445 is about 73.3379588451.

The spelling of 394445 in words is "three hundred ninety-four thousand, four hundred forty-five".