195820 has 12 divisors (see below), whose sum is σ = 411264. Its totient is φ = 78320.

The previous prime is 195817. The next prime is 195863. The reversal of 195820 is 28591.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4876 + ... + 4915.

It is an arithmetic number, because the mean of its divisors is an integer number (34272).

2¹⁹⁵⁸²⁰ is an apocalyptic number.

195820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

195820 is an abundant number, since it is smaller than the sum of its proper divisors (215444).

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

195820 is a wasteful number, since it uses less digits than its factorization.

195820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9800 (or 9798 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 195820 is about 442.5155364504. The cubic root of 195820 is about 58.0700698922.

The spelling of 195820 in words is "one hundred ninety-five thousand, eight hundred twenty".