439386394 has 4 divisors (see below), whose sum is σ = 659079594. Its totient is φ = 219693196.

The previous prime is 439386383. The next prime is 439386401. The reversal of 439386394 is 493683934.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 493683934 = 2 ⋅246841967.

It can be written as a sum of positive squares in only one way, i.e., 419717169 + 19669225 = 20487^2 + 4435^2 .

It is a Smith number, since the sum of its digits (49) 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, 109846597 + ... + 109846600.

Almost surely, 2^439386394 is an apocalyptic number.

439386394 is a deficient number, since it is larger than the sum of its proper divisors (219693200).

439386394 is a wasteful number, since it uses less digits than its factorization.

439386394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219693199.

The product of its digits is 1679616, while the sum is 49.

The square root of 439386394 is about 20961.5456014102. The cubic root of 439386394 is about 760.2367648750.

The spelling of 439386394 in words is "four hundred thirty-nine million, three hundred eighty-six thousand, three hundred ninety-four".