394830878 has 16 divisors (see below), whose sum is σ = 644973840. Its totient is φ = 180181056.

The previous prime is 394830871. The next prime is 394830881. The reversal of 394830878 is 878038493.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394830871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83000 + ... + 87627.

It is an arithmetic number, because the mean of its divisors is an integer number (40310865).

Almost surely, 2^394830878 is an apocalyptic number.

394830878 is a deficient number, since it is larger than the sum of its proper divisors (250142962).

394830878 is a wasteful number, since it uses less digits than its factorization.

394830878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170731.

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

The square root of 394830878 is about 19870.3517331727. The cubic root of 394830878 is about 733.6186609162.

The spelling of 394830878 in words is "three hundred ninety-four million, eight hundred thirty thousand, eight hundred seventy-eight".