210028 has 24 divisors (see below), whose sum is σ = 453152. Its totient is φ = 82944.

The previous prime is 210019. The next prime is 210031. The reversal of 210028 is 820012.

210028 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×210028² = 88223521568, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a plaindrome in base 16.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76 + ... + 652.

2²¹⁰⁰²⁸ is an apocalyptic number.

210028 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 210028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (226576).

210028 is an abundant number, since it is smaller than the sum of its proper divisors (243124).

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

210028 is a wasteful number, since it uses less digits than its factorization.

210028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 601 (or 599 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 210028 is about 458.2881189819. The cubic root of 210028 is about 59.4418611533.

The spelling of 210028 in words is "two hundred ten thousand, twenty-eight".