195239128 has 48 divisors (see below), whose sum is σ = 434941920. Its totient is φ = 81885888.

The previous prime is 195239113. The next prime is 195239129. The reversal of 195239128 is 821932591.

195239128 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195239129) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13126 + ... + 23722.

It is an arithmetic number, because the mean of its divisors is an integer number (9061290).

Almost surely, 2^195239128 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 195239128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (217470960).

195239128 is an abundant number, since it is smaller than the sum of its proper divisors (239702792).

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

195239128 is a wasteful number, since it uses less digits than its factorization.

195239128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10664 (or 10653 counting only the distinct ones).

The product of its digits is 38880, while the sum is 40.

The square root of 195239128 is about 13972.7995763197. The cubic root of 195239128 is about 580.1259417353.

The spelling of 195239128 in words is "one hundred ninety-five million, two hundred thirty-nine thousand, one hundred twenty-eight".