210828 has 12 divisors (see below), whose sum is σ = 491960. Its totient is φ = 70272.

The previous prime is 210827. The next prime is 210839. The reversal of 210828 is 828012.

It is a tau number, because it is divible by the number of its divisors (12).

It is a plaindrome in base 16.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 210828.

It is not an unprimeable number, because it can be changed into a prime (210823) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8773 + ... + 8796.

2²¹⁰⁸²⁸ is an apocalyptic number.

It is an amenable number.

210828 is an abundant number, since it is smaller than the sum of its proper divisors (281132).

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

210828 is a wasteful number, since it uses less digits than its factorization.

210828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17576 (or 17574 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

The square root of 210828 is about 459.1601027964. The cubic root of 210828 is about 59.5172371969.

The spelling of 210828 in words is "two hundred ten thousand, eight hundred twenty-eight".