394887854 has 4 divisors (see below), whose sum is σ = 592331784. Its totient is φ = 197443926.

The previous prime is 394887853. The next prime is 394887859. The reversal of 394887854 is 458788493.

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

It is a self number, because there is not a number n which added to its sum of digits gives 394887854.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394887853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98721962 + ... + 98721965.

It is an arithmetic number, because the mean of its divisors is an integer number (148082946).

Almost surely, 2^394887854 is an apocalyptic number.

394887854 is a deficient number, since it is larger than the sum of its proper divisors (197443930).

394887854 is a wasteful number, since it uses less digits than its factorization.

394887854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197443929.

The product of its digits is 7741440, while the sum is 56.

The square root of 394887854 is about 19871.7853752500. The cubic root of 394887854 is about 733.6539474560.

The spelling of 394887854 in words is "three hundred ninety-four million, eight hundred eighty-seven thousand, eight hundred fifty-four".