226638 has 20 divisors (see below), whose sum is σ = 508200. Its totient is φ = 75492.

The previous prime is 226637. The next prime is 226643. The reversal of 226638 is 836622.

226638 is a `hidden beast` number, since 2 + 26 + 638 = 666.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (226631) 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 9 ways as a sum of consecutive naturals, for example, 538 + ... + 861.

It is an arithmetic number, because the mean of its divisors is an integer number (25410).

2²²⁶⁶³⁸ is an apocalyptic number.

226638 is an abundant number, since it is smaller than the sum of its proper divisors (281562).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

226638 is a wasteful number, since it uses less digits than its factorization.

226638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1413 (or 1404 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 226638 is about 476.0651215958. The cubic root of 226638 is about 60.9692580024.

It can be divided in two parts, 2266 and 38, that added together give a square (2304 = 48²).

The spelling of 226638 in words is "two hundred twenty-six thousand, six hundred thirty-eight".