258838 has 4 divisors (see below), whose sum is σ = 388260. Its totient is φ = 129418.

The previous prime is 258827. The next prime is 258847. The reversal of 258838 is 838852.

It is a happy number.

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

It is a super-2 number, since 2×258838² = 133994220488, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

258838 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64708 + ... + 64711.

It is an arithmetic number, because the mean of its divisors is an integer number (97065).

2²⁵⁸⁸³⁸ is an apocalyptic number.

258838 is a deficient number, since it is larger than the sum of its proper divisors (129422).

258838 is a wasteful number, since it uses less digits than its factorization.

258838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129421.

The product of its digits is 15360, while the sum is 34.

The square root of 258838 is about 508.7612406621. The cubic root of 258838 is about 63.7298180380.

The spelling of 258838 in words is "two hundred fifty-eight thousand, eight hundred thirty-eight".