220984 has 16 divisors (see below), whose sum is σ = 432720. Its totient is φ = 105600.

The previous prime is 220973. The next prime is 221021. The reversal of 220984 is 489022.

220984 is nontrivially palindromic in base 7.

It is a congruent number.

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, 417 + ... + 784.

It is an arithmetic number, because the mean of its divisors is an integer number (27045).

2²²⁰⁹⁸⁴ is an apocalyptic number.

It is an amenable number.

220984 is a deficient number, since it is larger than the sum of its proper divisors (211736).

220984 is a wasteful number, since it uses less digits than its factorization.

220984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1230 (or 1226 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 220984 is about 470.0893532085. The cubic root of 220984 is about 60.4579768737.

The spelling of 220984 in words is "two hundred twenty thousand, nine hundred eighty-four".