394642368 has 140 divisors (see below), whose sum is σ = 1178341560. Its totient is φ = 130595328.

The previous prime is 394642321. The next prime is 394642379. The reversal of 394642368 is 863246493.

It is a nude number because it is divisible by every one of its digits.

Its product of digits (746496) is a multiple of the sum of its prime factors (576).

It is a congruent number.

It is an unprimeable number.

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 19 ways as a sum of consecutive naturals, for example, 1394355 + ... + 1394637.

Almost surely, 2^394642368 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 394642368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (589170780).

394642368 is an abundant number, since it is smaller than the sum of its proper divisors (783699192).

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

394642368 is a wasteful number, since it uses less digits than its factorization.

394642368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 576 (or 557 counting only the distinct ones).

The product of its digits is 746496, while the sum is 45.

The square root of 394642368 is about 19865.6076675243. The cubic root of 394642368 is about 733.5018881605.

The spelling of 394642368 in words is "three hundred ninety-four million, six hundred forty-two thousand, three hundred sixty-eight".