258398 has 8 divisors (see below), whose sum is σ = 442992. Its totient is φ = 110736.

The previous prime is 258389. The next prime is 258403. The reversal of 258398 is 893852.

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

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 258398.

It is an unprimeable number.

258398 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 3 ways as a sum of consecutive naturals, for example, 9215 + ... + 9242.

It is an arithmetic number, because the mean of its divisors is an integer number (55374).

2²⁵⁸³⁹⁸ is an apocalyptic number.

258398 is a deficient number, since it is larger than the sum of its proper divisors (184594).

258398 is a wasteful number, since it uses less digits than its factorization.

258398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18466.

The product of its digits is 17280, while the sum is 35.

The square root of 258398 is about 508.3286338581. The cubic root of 258398 is about 63.6936860120.

It can be divided in two parts, 258 and 398, that added together give a palindrome (656).

The spelling of 258398 in words is "two hundred fifty-eight thousand, three hundred ninety-eight".