394405942 has 8 divisors (see below), whose sum is σ = 676124496. Its totient is φ = 169031112.

The previous prime is 394405939. The next prime is 394405961. The reversal of 394405942 is 249504493.

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

It is a junction number, because it is equal to n+sod(n) for n = 394405895 and 394405904.

It is a congruent number.

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, 14085913 + ... + 14085940.

It is an arithmetic number, because the mean of its divisors is an integer number (84515562).

Almost surely, 2^394405942 is an apocalyptic number.

394405942 is a deficient number, since it is larger than the sum of its proper divisors (281718554).

394405942 is a wasteful number, since it uses less digits than its factorization.

394405942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28171862.

The product of its (nonzero) digits is 155520, while the sum is 40.

The square root of 394405942 is about 19859.6561400242. The cubic root of 394405942 is about 733.3553812012.

The spelling of 394405942 in words is "three hundred ninety-four million, four hundred five thousand, nine hundred forty-two".