220838 has 4 divisors (see below), whose sum is σ = 331260. Its totient is φ = 110418.

The previous prime is 220811. The next prime is 220841. The reversal of 220838 is 838022.

220838 is nontrivially palindromic in base 13.

220838 is an esthetic number in base 15, because in such base its adjacent digits differ by 1.

It is a semiprime because it is the product of two primes.

It is a plaindrome in base 15.

It is a nialpdrome in base 6.

It is a zygodrome in base 6.

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 as a sum of consecutive naturals, namely, 55208 + ... + 55211.

It is an arithmetic number, because the mean of its divisors is an integer number (82815).

2²²⁰⁸³⁸ is an apocalyptic number.

220838 is a deficient number, since it is larger than the sum of its proper divisors (110422).

220838 is a wasteful number, since it uses less digits than its factorization.

220838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110421.

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 220838 is about 469.9340379245. The cubic root of 220838 is about 60.4446594551. Note that the first 3 decimals are identical.

The spelling of 220838 in words is "two hundred twenty thousand, eight hundred thirty-eight".