394730220 has 96 divisors (see below), whose sum is σ = 1138173120. Its totient is φ = 102169600.

The previous prime is 394730201. The next prime is 394730221. The reversal of 394730220 is 22037493.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (394730221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 320566 + ... + 321794.

It is an arithmetic number, because the mean of its divisors is an integer number (11855970).

Almost surely, 2^394730220 is an apocalyptic number.

394730220 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 394730220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (569086560).

394730220 is an abundant number, since it is smaller than the sum of its proper divisors (743442900).

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

394730220 is a wasteful number, since it uses less digits than its factorization.

394730220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1395 (or 1393 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 30.

The square root of 394730220 is about 19867.8187026155. The cubic root of 394730220 is about 733.5563128178.

The spelling of 394730220 in words is "three hundred ninety-four million, seven hundred thirty thousand, two hundred twenty".