195963138 has 40 divisors (see below), whose sum is σ = 501834432. Its totient is φ = 55989144.

The previous prime is 195963127. The next prime is 195963139. The reversal of 195963138 is 831369591.

195963138 is a `hidden beast` number, since 1 + 9 + 5 + 9 + 631 + 3 + 8 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 195963093 and 195963102.

It is not an unprimeable number, because it can be changed into a prime (195963139) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 85270 + ... + 87537.

Almost surely, 2^195963138 is an apocalyptic number.

195963138 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

195963138 is an abundant number, since it is smaller than the sum of its proper divisors (305871294).

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

195963138 is a wasteful number, since it uses less digits than its factorization.

195963138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172828 (or 172819 counting only the distinct ones).

The product of its digits is 174960, while the sum is 45.

The square root of 195963138 is about 13998.6834380952. The cubic root of 195963138 is about 580.8421555189.

The spelling of 195963138 in words is "one hundred ninety-five million, nine hundred sixty-three thousand, one hundred thirty-eight".