220828 has 6 divisors (see below), whose sum is σ = 386456. Its totient is φ = 110412.

The previous prime is 220811. The next prime is 220841. The reversal of 220828 is 828022.

It is a plaindrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 220799 and 220808.

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, 27600 + ... + 27607.

2²²⁰⁸²⁸ is an apocalyptic number.

It is an amenable number.

220828 is a deficient number, since it is larger than the sum of its proper divisors (165628).

220828 is a wasteful number, since it uses less digits than its factorization.

220828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55211 (or 55209 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 22.

The square root of 220828 is about 469.9233980129. The cubic root of 220828 is about 60.4437470884.

The spelling of 220828 in words is "two hundred twenty thousand, eight hundred twenty-eight".