394820447 has 8 divisors (see below), whose sum is σ = 462229152. Its totient is φ = 330163200.

The previous prime is 394820443. The next prime is 394820449. The reversal of 394820447 is 744028493.

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 394820447 - 2² = 394820443 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394820443) 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, 687554 + ... + 688127.

It is an arithmetic number, because the mean of its divisors is an integer number (57778644).

Almost surely, 2^394820447 is an apocalyptic number.

394820447 is a deficient number, since it is larger than the sum of its proper divisors (67408705).

394820447 is a wasteful number, since it uses less digits than its factorization.

394820447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1375729.

The product of its (nonzero) digits is 193536, while the sum is 41.

The square root of 394820447 is about 19870.0892549581. The cubic root of 394820447 is about 733.6122003917.

The spelling of 394820447 in words is "three hundred ninety-four million, eight hundred twenty thousand, four hundred forty-seven".