394442841 has 8 divisors (see below), whose sum is σ = 566379520. Its totient is φ = 242734032.

The previous prime is 394442779. The next prime is 394442849. The reversal of 394442841 is 148244493.

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

It is not a de Polignac number, because 394442841 - 2²¹ = 392345689 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 10113919 = 394442841 / (3 + 9 + 4 + 4 + 4 + 2 + 8 + 4 + 1).

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 394442841.

It is not an unprimeable number, because it can be changed into a prime (394442849) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5056921 + ... + 5056998.

It is an arithmetic number, because the mean of its divisors is an integer number (70797440).

Almost surely, 2^394442841 is an apocalyptic number.

It is an amenable number.

394442841 is a deficient number, since it is larger than the sum of its proper divisors (171936679).

394442841 is a wasteful number, since it uses less digits than its factorization.

394442841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10113935.

The product of its digits is 110592, while the sum is 39.

The square root of 394442841 is about 19860.5851122267. The cubic root of 394442841 is about 733.3782503938.

The spelling of 394442841 in words is "three hundred ninety-four million, four hundred forty-two thousand, eight hundred forty-one".