394444447 has 4 divisors (see below), whose sum is σ = 394491816. Its totient is φ = 394397080.

The previous prime is 394444439. The next prime is 394444471. The reversal of 394444447 is 744444493.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 394444447 - 2³ = 394444439 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394444487) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7513 + ... + 29074.

It is an arithmetic number, because the mean of its divisors is an integer number (98622954).

Almost surely, 2^394444447 is an apocalyptic number.

394444447 is a deficient number, since it is larger than the sum of its proper divisors (47369).

394444447 is a wasteful number, since it uses less digits than its factorization.

394444447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47368.

The product of its digits is 774144, while the sum is 43.

The square root of 394444447 is about 19860.6255440255. The cubic root of 394444447 is about 733.3792457251.

The spelling of 394444447 in words is "three hundred ninety-four million, four hundred forty-four thousand, four hundred forty-seven".