195139944 has 48 divisors (see below), whose sum is σ = 533971620. Its totient is φ = 64373760.

The previous prime is 195139943. The next prime is 195139999. The reversal of 195139944 is 449931591.

195139944 is a `hidden beast` number, since 1 + 9 + 513 + 99 + 44 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 194937444 + 202500 = 13962^2 + 450^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 195139944.

It is not an unprimeable number, because it can be changed into a prime (195139943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6987 + ... + 20954.

Almost surely, 2^195139944 is an apocalyptic number.

It is an amenable number.

195139944 is an abundant number, since it is smaller than the sum of its proper divisors (338831676).

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

195139944 is a wasteful number, since it uses less digits than its factorization.

195139944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28050 (or 28043 counting only the distinct ones).

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

The square root of 195139944 is about 13969.2499440736. The cubic root of 195139944 is about 580.0276879370.

The spelling of 195139944 in words is "one hundred ninety-five million, one hundred thirty-nine thousand, nine hundred forty-four".