195987220 has 192 divisors, whose sum is σ = 533433600. Its totient is φ = 59351040.

The previous prime is 195987157. The next prime is 195987221. The reversal of 195987220 is 22789591.

195987220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a zygodrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195987221) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1409911 + ... + 1410049.

It is an arithmetic number, because the mean of its divisors is an integer number (2778300).

Almost surely, 2^195987220 is an apocalyptic number.

195987220 is a gapful number since it is divisible by the number (10) 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 195987220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (266716800).

195987220 is an abundant number, since it is smaller than the sum of its proper divisors (337446380).

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

195987220 is a wasteful number, since it uses less digits than its factorization.

195987220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218 (or 216 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 43.

The square root of 195987220 is about 13999.5435639881. The cubic root of 195987220 is about 580.8659478640.

The spelling of 195987220 in words is "one hundred ninety-five million, nine hundred eighty-seven thousand, two hundred twenty".