220998 has 8 divisors (see below), whose sum is σ = 442008. Its totient is φ = 73664.

The previous prime is 220973. The next prime is 221021. The reversal of 220998 is 899022.

It is a sphenic number, since it is the product of 3 distinct primes.

220998 is an admirable number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 220998.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 18411 + ... + 18422.

It is an arithmetic number, because the mean of its divisors is an integer number (55251).

2²²⁰⁹⁹⁸ is an apocalyptic number.

220998 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

220998 is a wasteful number, since it uses less digits than its factorization.

220998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36838.

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 220998 is about 470.1042437588. The cubic root of 220998 is about 60.4592535782.

The spelling of 220998 in words is "two hundred twenty thousand, nine hundred ninety-eight".