394744320 has 160 divisors (see below), whose sum is σ = 1402410240. Its totient is φ = 105246720.

The previous prime is 394744303. The next prime is 394744333. The reversal of 394744320 is 23447493.

It is a tau number, because it is divible by the number of its divisors (160).

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66265 + ... + 71975.

It is an arithmetic number, because the mean of its divisors is an integer number (8765064).

Almost surely, 2^394744320 is an apocalyptic number.

394744320 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 394744320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (701205120).

394744320 is an abundant number, since it is smaller than the sum of its proper divisors (1007665920).

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

394744320 is an equidigital number, since it uses as much as digits as its factorization.

394744320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5743 (or 5721 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 36.

The square root of 394744320 is about 19868.1735446417. The cubic root of 394744320 is about 733.5650470708.

The spelling of 394744320 in words is "three hundred ninety-four million, seven hundred forty-four thousand, three hundred twenty".