220866 has 16 divisors (see below), whose sum is σ = 446688. Its totient is φ = 72800.
The previous prime is 220861. The next prime is 220873. The reversal of 220866 is 668022.
It is not an unprimeable number, because it can be changed into a prime (220861) by changing a digit.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 646 + ... + 926.
It is an arithmetic number, because the mean of its divisors is an integer number (27918).
2220866 is an apocalyptic number.
220866 is an abundant number, since it is smaller than the sum of its proper divisors (225822).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
220866 is a wasteful number, since it uses less digits than its factorization.
220866 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 417.
The product of its (nonzero) digits is 1152, while the sum is 24.
The square root of 220866 is about 469.9638283953. The cubic root of 220866 is about 60.4472139354.
Adding to 220866 its reverse (668022), we get a palindrome (888888).
The spelling of 220866 in words is "two hundred twenty thousand, eight hundred sixty-six".
• e-mail: info -at- numbersaplenty.com • Privacy notice • done in 0.070 sec. • engine limits •