398365 has 8 divisors (see below), whose sum is σ = 521568. Its totient is φ = 289680.

The previous prime is 398357. The next prime is 398369. The reversal of 398365 is 563893.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 398365 - 2³ = 398357 is a prime.

It is a Duffinian number.

398365 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 398365.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398369) 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, 3567 + ... + 3676.

It is an arithmetic number, because the mean of its divisors is an integer number (65196).

2³⁹⁸³⁶⁵ is an apocalyptic number.

It is an amenable number.

398365 is a deficient number, since it is larger than the sum of its proper divisors (123203).

398365 is a wasteful number, since it uses less digits than its factorization.

398365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7259.

The product of its digits is 19440, while the sum is 34.

The square root of 398365 is about 631.1616274775. The cubic root of 398365 is about 73.5801030218.

The spelling of 398365 in words is "three hundred ninety-eight thousand, three hundred sixty-five".