398111 has 4 divisors (see below), whose sum is σ = 454992. Its totient is φ = 341232.

The previous prime is 398087. The next prime is 398113. The reversal of 398111 is 111893.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-398111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28430 + ... + 28443.

It is an arithmetic number, because the mean of its divisors is an integer number (113748).

2³⁹⁸¹¹¹ is an apocalyptic number.

398111 is a deficient number, since it is larger than the sum of its proper divisors (56881).

398111 is an equidigital number, since it uses as much as digits as its factorization.

398111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56880.

The product of its digits is 216, while the sum is 23.

The square root of 398111 is about 630.9603791047. The cubic root of 398111 is about 73.5644613199.

The spelling of 398111 in words is "three hundred ninety-eight thousand, one hundred eleven".