195789920 has 24 divisors (see below), whose sum is σ = 462554064. Its totient is φ = 78315904.

The previous prime is 195789917. The next prime is 195789929. The reversal of 195789920 is 29987591.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195789929) 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, 611684 + ... + 612003.

It is an arithmetic number, because the mean of its divisors is an integer number (19273086).

Almost surely, 2^195789920 is an apocalyptic number.

195789920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

195789920 is an abundant number, since it is smaller than the sum of its proper divisors (266764144).

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

195789920 is a wasteful number, since it uses less digits than its factorization.

195789920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1223702 (or 1223694 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 50.

The square root of 195789920 is about 13992.4951313195. The cubic root of 195789920 is about 580.6709634996.

The spelling of 195789920 in words is "one hundred ninety-five million, seven hundred eighty-nine thousand, nine hundred twenty".