223858 has 16 divisors (see below), whose sum is σ = 364320. Its totient is φ = 102816.

The previous prime is 223849. The next prime is 223903. The reversal of 223858 is 858322.

It is a super-2 number, since 2×223858² = 100224808328, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1566 + ... + 1702.

It is an arithmetic number, because the mean of its divisors is an integer number (22770).

2²²³⁸⁵⁸ is an apocalyptic number.

223858 is a deficient number, since it is larger than the sum of its proper divisors (140462).

223858 is a wasteful number, since it uses less digits than its factorization.

223858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201.

The product of its digits is 3840, while the sum is 28.

The square root of 223858 is about 473.1363439855. The cubic root of 223858 is about 60.7189435214.

It can be divided in two parts, 223 and 858, that added together give a triangular number (1081 = T₄₆).

The spelling of 223858 in words is "two hundred twenty-three thousand, eight hundred fifty-eight".