394644845 has 8 divisors (see below), whose sum is σ = 541227264. Its totient is φ = 270613584.

The previous prime is 394644821. The next prime is 394644871. The reversal of 394644845 is 548446493.

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

It is a cyclic number.

It is not a de Polignac number, because 394644845 - 2¹⁸ = 394382701 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 394644845.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5637749 + ... + 5637818.

It is an arithmetic number, because the mean of its divisors is an integer number (67653408).

Almost surely, 2^394644845 is an apocalyptic number.

394644845 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

394644845 is a deficient number, since it is larger than the sum of its proper divisors (146582419).

394644845 is a wasteful number, since it uses less digits than its factorization.

394644845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11275579.

The product of its digits is 1658880, while the sum is 47.

The square root of 394644845 is about 19865.6700113538. The cubic root of 394644845 is about 733.5034227824.

It can be divided in two parts, 3946448 and 45, that added together give a palindrome (3946493).

The spelling of 394644845 in words is "three hundred ninety-four million, six hundred forty-four thousand, eight hundred forty-five".