197828 has 18 divisors (see below), whose sum is σ = 368046. Its totient is φ = 93024.

The previous prime is 197807. The next prime is 197831. The reversal of 197828 is 828791.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 174724 + 23104 = 418^2 + 152^2 .

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1376 + ... + 1512.

It is an arithmetic number, because the mean of its divisors is an integer number (20447).

2¹⁹⁷⁸²⁸ is an apocalyptic number.

It is an amenable number.

197828 is a deficient number, since it is larger than the sum of its proper divisors (170218).

197828 is a wasteful number, since it uses less digits than its factorization.

197828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179 (or 158 counting only the distinct ones).

The product of its digits is 8064, while the sum is 35.

The square root of 197828 is about 444.7785966073. The cubic root of 197828 is about 58.2678848727.

The spelling of 197828 in words is "one hundred ninety-seven thousand, eight hundred twenty-eight".