394299864 has 144 divisors (see below), whose sum is σ = 1260085320. Its totient is φ = 111041280.

The previous prime is 394299847. The next prime is 394299869. The reversal of 394299864 is 468992493.

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

It is a self number, because there is not a number n which added to its sum of digits gives 394299864.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394299869) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 256779 + ... + 258309.

Almost surely, 2^394299864 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 394299864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (630042660).

394299864 is an abundant number, since it is smaller than the sum of its proper divisors (865785456).

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

394299864 is a wasteful number, since it uses less digits than its factorization.

394299864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1630 (or 1616 counting only the distinct ones).

The product of its digits is 3359232, while the sum is 54.

The square root of 394299864 is about 19856.9852696727. The cubic root of 394299864 is about 733.2896284330.

The spelling of 394299864 in words is "three hundred ninety-four million, two hundred ninety-nine thousand, eight hundred sixty-four".