394760042 has 4 divisors (see below), whose sum is σ = 592140066. Its totient is φ = 197380020.

The previous prime is 394760029. The next prime is 394760053. The reversal of 394760042 is 240067493.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 386869561 + 7890481 = 19669^2 + 2809^2 .

It is a junction number, because it is equal to n+sod(n) for n = 394759984 and 394760011.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98690009 + ... + 98690012.

Almost surely, 2^394760042 is an apocalyptic number.

394760042 is a deficient number, since it is larger than the sum of its proper divisors (197380024).

394760042 is a wasteful number, since it uses less digits than its factorization.

394760042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197380023.

The product of its (nonzero) digits is 36288, while the sum is 35.

The square root of 394760042 is about 19868.5691986112. The cubic root of 394760042 is about 733.5747858274.

The spelling of 394760042 in words is "three hundred ninety-four million, seven hundred sixty thousand, forty-two".