394106842 has 8 divisors (see below), whose sum is σ = 605578932. Its totient is φ = 192247200.

The previous prime is 394106833. The next prime is 394106857. The reversal of 394106842 is 248601493.

It can be written as a sum of positive squares in 2 ways, for example, as 269583561 + 124523281 = 16419^2 + 11159^2 .

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

It is a super-2 number, since 2×394106842² = 310640405822425928, which contains 22 as substring.

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, 2403009 + ... + 2403172.

Almost surely, 2^394106842 is an apocalyptic number.

394106842 is a deficient number, since it is larger than the sum of its proper divisors (211472090).

394106842 is a wasteful number, since it uses less digits than its factorization.

394106842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4806224.

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 394106842 is about 19852.1243699509. The cubic root of 394106842 is about 733.1699529050.

The spelling of 394106842 in words is "three hundred ninety-four million, one hundred six thousand, eight hundred forty-two".