220986 has 12 divisors (see below), whose sum is σ = 478842. Its totient is φ = 73656.

The previous prime is 220973. The next prime is 221021. The reversal of 220986 is 689022.

It can be written as a sum of positive squares in only one way, i.e., 216225 + 4761 = 465^2 + 69^2 .

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

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 220986.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6121 + ... + 6156.

2²²⁰⁹⁸⁶ is an apocalyptic number.

220986 is an abundant number, since it is smaller than the sum of its proper divisors (257856).

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

220986 is a wasteful number, since it uses less digits than its factorization.

220986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12285 (or 12282 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 220986 is about 470.0914804589. The cubic root of 220986 is about 60.4581592633.

The spelling of 220986 in words is "two hundred twenty thousand, nine hundred eighty-six".