394806004178 has 4 divisors (see below), whose sum is σ = 592209006270. Its totient is φ = 197403002088.

The previous prime is 394806004169. The next prime is 394806004253. The reversal of 394806004178 is 871400608493.

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., 283868380849 + 110937623329 = 532793^2 + 333073^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98701501043 + ... + 98701501046.

Almost surely, 2^394806004178 is an apocalyptic number.

394806004178 is a deficient number, since it is larger than the sum of its proper divisors (197403002092).

394806004178 is a wasteful number, since it uses less digits than its factorization.

394806004178 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197403002091.

The product of its (nonzero) digits is 1161216, while the sum is 50.

The spelling of 394806004178 in words is "three hundred ninety-four billion, eight hundred six million, four thousand, one hundred seventy-eight".