394039394 has 8 divisors (see below), whose sum is σ = 675496128. Its totient is φ = 168874020.

The previous prime is 394039369. The next prime is 394039403. The reversal of 394039394 is 493930493.

It is a happy number.

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

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, 14072822 + ... + 14072849.

It is an arithmetic number, because the mean of its divisors is an integer number (84437016).

Almost surely, 2^394039394 is an apocalyptic number.

394039394 is a deficient number, since it is larger than the sum of its proper divisors (281456734).

394039394 is a wasteful number, since it uses less digits than its factorization.

394039394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28145680.

The product of its (nonzero) digits is 314928, while the sum is 44.

The square root of 394039394 is about 19850.4255370005. The cubic root of 394039394 is about 733.1281252727.

It can be divided in two parts, 3940 and 39394, that added together give a palindrome (43334).

The spelling of 394039394 in words is "three hundred ninety-four million, thirty-nine thousand, three hundred ninety-four".