258638 has 8 divisors (see below), whose sum is σ = 410832. Its totient is φ = 121696.

The previous prime is 258637. The next prime is 258659. The reversal of 258638 is 836852.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (258631) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 3770 + ... + 3837.

It is an arithmetic number, because the mean of its divisors is an integer number (51354).

2²⁵⁸⁶³⁸ is an apocalyptic number.

258638 is a deficient number, since it is larger than the sum of its proper divisors (152194).

258638 is a wasteful number, since it uses less digits than its factorization.

258638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7626.

The product of its digits is 11520, while the sum is 32.

The square root of 258638 is about 508.5646468248. The cubic root of 258638 is about 63.7133994700.

The spelling of 258638 in words is "two hundred fifty-eight thousand, six hundred thirty-eight".