195909888 has 72 divisors (see below), whose sum is σ = 528169600. Its totient is φ = 64456704.

The previous prime is 195909869. The next prime is 195909919. The reversal of 195909888 is 888909591.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59058 + ... + 62286.

Almost surely, 2^195909888 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 195909888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (264084800).

195909888 is an abundant number, since it is smaller than the sum of its proper divisors (332259712).

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

195909888 is an equidigital number, since it uses as much as digits as its factorization.

195909888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3327 (or 3313 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 57.

The square root of 195909888 is about 13996.7813442948. The cubic root of 195909888 is about 580.7895390811.

The spelling of 195909888 in words is "one hundred ninety-five million, nine hundred nine thousand, eight hundred eighty-eight".