394220 has 24 divisors (see below), whose sum is σ = 864864. Its totient is φ = 150656.

The previous prime is 394211. The next prime is 394223. The reversal of 394220 is 22493.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a d-powerful number, because it can be written as 3⁵ + 9³ + 2⁵ + 4⁹ + 2¹⁷ + 0 .

It is a junction number, because it is equal to n+sod(n) for n = 394192 and 394201.

It is not an unprimeable number, because it can be changed into a prime (394223) by changing a digit.

394220 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32 + ... + 888.

It is an arithmetic number, because the mean of its divisors is an integer number (36036).

2³⁹⁴²²⁰ 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 394220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (432432).

394220 is an abundant number, since it is smaller than the sum of its proper divisors (470644).

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

394220 is a wasteful number, since it uses less digits than its factorization.

394220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 889 (or 887 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 394220 is about 627.8694131744. The cubic root of 394220 is about 73.3240116710.

The spelling of 394220 in words is "three hundred ninety-four thousand, two hundred twenty".