394001000 has 128 divisors (see below), whose sum is σ = 962357760. Its totient is φ = 150880000.

The previous prime is 394000987. The next prime is 394001009. The reversal of 394001000 is 100493.

It is a self number, because there is not a number n which added to its sum of digits gives 394001000.

It is not an unprimeable number, because it can be changed into a prime (394001009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3900950 + ... + 3901050.

It is an arithmetic number, because the mean of its divisors is an integer number (7518420).

Almost surely, 2^394001000 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 394001000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (481178880).

394001000 is an abundant number, since it is smaller than the sum of its proper divisors (568356760).

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

394001000 is a wasteful number, since it uses less digits than its factorization.

394001000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252 (or 238 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 394001000 is about 19849.4584308993. The cubic root of 394001000 is about 733.1043132411.

Adding to 394001000 its reverse (100493), we get a palindrome (394101493).

The spelling of 394001000 in words is "three hundred ninety-four million, one thousand".