195715128 has 64 divisors (see below), whose sum is σ = 563650560. Its totient is φ = 55472256.

The previous prime is 195715123. The next prime is 195715129. The reversal of 195715128 is 821517591.

It is a super-2 number, since 2×195715128² = 76608822656112768, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195715123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16750 + ... + 25922.

It is an arithmetic number, because the mean of its divisors is an integer number (8807040).

Almost surely, 2^195715128 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 195715128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (281825280).

195715128 is an abundant number, since it is smaller than the sum of its proper divisors (367935432).

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

195715128 is a wasteful number, since it uses less digits than its factorization.

195715128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9316 (or 9312 counting only the distinct ones).

The product of its digits is 25200, while the sum is 39.

The square root of 195715128 is about 13989.8223005155. The cubic root of 195715128 is about 580.5970150656.

The spelling of 195715128 in words is "one hundred ninety-five million, seven hundred fifteen thousand, one hundred twenty-eight".