398266 has 16 divisors (see below), whose sum is σ = 668448. Its totient is φ = 176400.

The previous prime is 398261. The next prime is 398267. The reversal of 398266 is 662893.

It is a happy number.

It is a d-powerful number, because it can be written as 3¹⁰ + 9⁵ + 2³ + 8 + 6³ + 6⁷ .

It is not an unprimeable number, because it can be changed into a prime (398261) 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, 736 + ... + 1156.

It is an arithmetic number, because the mean of its divisors is an integer number (41778).

2³⁹⁸²⁶⁶ is an apocalyptic number.

398266 is a deficient number, since it is larger than the sum of its proper divisors (270182).

398266 is a wasteful number, since it uses less digits than its factorization.

398266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 477.

The product of its digits is 15552, while the sum is 34.

The square root of 398266 is about 631.0831957833. The cubic root of 398266 is about 73.5740072439.

The spelling of 398266 in words is "three hundred ninety-eight thousand, two hundred sixty-six".