394901109478 has 4 divisors (see below), whose sum is σ = 592351664220. Its totient is φ = 197450554738.

The previous prime is 394901109389. The next prime is 394901109481. The reversal of 394901109478 is 874901109493.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98725277368 + ... + 98725277371.

It is an arithmetic number, because the mean of its divisors is an integer number (148087916055).

Almost surely, 2^394901109478 is an apocalyptic number.

394901109478 is a deficient number, since it is larger than the sum of its proper divisors (197450554742).

394901109478 is a wasteful number, since it uses less digits than its factorization.

394901109478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197450554741.

The product of its (nonzero) digits is 1959552, while the sum is 55.

The spelling of 394901109478 in words is "three hundred ninety-four billion, nine hundred one million, one hundred nine thousand, four hundred seventy-eight".