398220 has 24 divisors (see below), whose sum is σ = 1115184. Its totient is φ = 106176.

The previous prime is 398219. The next prime is 398227. The reversal of 398220 is 22893.

It is not an unprimeable number, because it can be changed into a prime (398227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3259 + ... + 3378.

It is an arithmetic number, because the mean of its divisors is an integer number (46466).

2³⁹⁸²²⁰ is an apocalyptic number.

398220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

398220 is an abundant number, since it is smaller than the sum of its proper divisors (716964).

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

398220 is a wasteful number, since it uses less digits than its factorization.

398220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6649 (or 6647 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 398220 is about 631.0467494568. The cubic root of 398220 is about 73.5711745185.

The spelling of 398220 in words is "three hundred ninety-eight thousand, two hundred twenty".