394642469 has 8 divisors (see below), whose sum is σ = 439655160. Its totient is φ = 351723456.

The previous prime is 394642447. The next prime is 394642477. The reversal of 394642469 is 964246493.

It can be written as a sum of positive squares in 4 ways, for example, as 103530625 + 291111844 = 10175^2 + 17062^2 .

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 394642469 - 2¹² = 394638373 is a prime.

It is a super-2 number, since 2×394642469² = 311485356676831922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394642439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 523022 + ... + 523775.

It is an arithmetic number, because the mean of its divisors is an integer number (54956895).

Almost surely, 2^394642469 is an apocalyptic number.

It is an amenable number.

394642469 is a deficient number, since it is larger than the sum of its proper divisors (45012691).

394642469 is a wasteful number, since it uses less digits than its factorization.

394642469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1046839.

The product of its digits is 1119744, while the sum is 47.

The square root of 394642469 is about 19865.6102096059. The cubic root of 394642469 is about 733.5019507351.

It can be divided in two parts, 3946424 and 69, that added together give a palindrome (3946493).

The spelling of 394642469 in words is "three hundred ninety-four million, six hundred forty-two thousand, four hundred sixty-nine".