195194538 has 216 divisors, whose sum is σ = 567665280. Its totient is φ = 48232800.

The previous prime is 195194513. The next prime is 195194539. The reversal of 195194538 is 835491591.

195194538 is a `hidden beast` number, since 195 + 1 + 9 + 453 + 8 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 195194493 and 195194502.

It is not an unprimeable number, because it can be changed into a prime (195194539) by changing a digit.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 3308353 + ... + 3308411.

It is an arithmetic number, because the mean of its divisors is an integer number (2628080).

Almost surely, 2^195194538 is an apocalyptic number.

195194538 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 195194538, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (283832640).

195194538 is an abundant number, since it is smaller than the sum of its proper divisors (372470742).

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

195194538 is a wasteful number, since it uses less digits than its factorization.

195194538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134 (or 113 counting only the distinct ones).

The product of its digits is 194400, while the sum is 45.

The square root of 195194538 is about 13971.2038851346. The cubic root of 195194538 is about 580.0817740429.

The spelling of 195194538 in words is "one hundred ninety-five million, one hundred ninety-four thousand, five hundred thirty-eight".