394978332254 has 8 divisors (see below), whose sum is σ = 646328180088. Its totient is φ = 179535605560.

The previous prime is 394978332191. The next prime is 394978332271. The reversal of 394978332254 is 452233879493.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 394978332193 and 394978332202.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8976780257 + ... + 8976780300.

It is an arithmetic number, because the mean of its divisors is an integer number (80791022511).

Almost surely, 2^394978332254 is an apocalyptic number.

394978332254 is a deficient number, since it is larger than the sum of its proper divisors (251349847834).

394978332254 is a wasteful number, since it uses less digits than its factorization.

394978332254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17953560570.

The product of its digits is 39191040, while the sum is 59.

The spelling of 394978332254 in words is "three hundred ninety-four billion, nine hundred seventy-eight million, three hundred thirty-two thousand, two hundred fifty-four".