220290 has 32 divisors (see below), whose sum is σ = 604800. Its totient is φ = 50304.

The previous prime is 220279. The next prime is 220291. The reversal of 220290 is 92022.

220290 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 220290.

It is not an unprimeable number, because it can be changed into a prime (220291) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 315 + ... + 734.

It is an arithmetic number, because the mean of its divisors is an integer number (18900).

2²²⁰²⁹⁰ is an apocalyptic number.

220290 is an abundant number, since it is smaller than the sum of its proper divisors (384510).

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

220290 is a wasteful number, since it uses less digits than its factorization.

220290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1066.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 220290 is about 469.3506152121. The cubic root of 220290 is about 60.3946211019.

The spelling of 220290 in words is "two hundred twenty thousand, two hundred ninety".