394813404 has 72 divisors (see below), whose sum is σ = 1016193360. Its totient is φ = 129226752.

The previous prime is 394813387. The next prime is 394813429. The reversal of 394813404 is 404318493.

It is a Harshad number since it is a multiple of its sum of digits (36).

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 23 ways as a sum of consecutive naturals, for example, 683964 + ... + 684540.

Almost surely, 2^394813404 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 394813404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (508096680).

394813404 is an abundant number, since it is smaller than the sum of its proper divisors (621379956).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

394813404 is a wasteful number, since it uses less digits than its factorization.

394813404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 899 (or 894 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 394813404 is about 19869.9120279884. The cubic root of 394813404 is about 733.6078381882.

The spelling of 394813404 in words is "three hundred ninety-four million, eight hundred thirteen thousand, four hundred four".