226290 has 32 divisors (see below), whose sum is σ = 573120. Its totient is φ = 57024.

The previous prime is 226283. The next prime is 226307. The reversal of 226290 is 92622.

It is a happy number.

It is a plaindrome in base 13.

It is a congruent number.

It is an unprimeable number.

226290 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 15 ways as a sum of consecutive naturals, for example, 372 + ... + 768.

It is an arithmetic number, because the mean of its divisors is an integer number (17910).

2²²⁶²⁹⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 226290, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (286560).

226290 is an abundant number, since it is smaller than the sum of its proper divisors (346830).

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

226290 is a wasteful number, since it uses less digits than its factorization.

226290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 226290 is about 475.6994849692. The cubic root of 226290 is about 60.9380361557.

The spelling of 226290 in words is "two hundred twenty-six thousand, two hundred ninety".