394447520 has 48 divisors (see below), whose sum is σ = 934996608. Its totient is φ = 157251840.

The previous prime is 394447519. The next prime is 394447561. The reversal of 394447520 is 25744493.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45797 + ... + 53723.

It is an arithmetic number, because the mean of its divisors is an integer number (19479096).

Almost surely, 2^394447520 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 394447520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (467498304).

394447520 is an abundant number, since it is smaller than the sum of its proper divisors (540549088).

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

394447520 is a wasteful number, since it uses less digits than its factorization.

394447520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8253 (or 8245 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 38.

The square root of 394447520 is about 19860.7029080040. The cubic root of 394447520 is about 733.3811502337.

It can be divided in two parts, 39444 and 7520, that added together give a palindrome (46964).

The spelling of 394447520 in words is "three hundred ninety-four million, four hundred forty-seven thousand, five hundred twenty".