394639104 has 144 divisors (see below), whose sum is σ = 1096107264. Its totient is φ = 125952000.

The previous prime is 394639103. The next prime is 394639109. The reversal of 394639104 is 401936493.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394639103) 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 15 ways as a sum of consecutive naturals, for example, 2613429 + ... + 2613579.

It is an arithmetic number, because the mean of its divisors is an integer number (7611856).

Almost surely, 2^394639104 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 394639104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (548053632).

394639104 is an abundant number, since it is smaller than the sum of its proper divisors (701468160).

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

394639104 is a wasteful number, since it uses less digits than its factorization.

394639104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294 (or 280 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 39.

The square root of 394639104 is about 19865.5255153243. The cubic root of 394639104 is about 733.4998659442.

The spelling of 394639104 in words is "three hundred ninety-four million, six hundred thirty-nine thousand, one hundred four".