195139844 has 12 divisors (see below), whose sum is σ = 341875968. Its totient is φ = 97461000.

The previous prime is 195139837. The next prime is 195139849. The reversal of 195139844 is 448931591.

It is a junction number, because it is equal to n+sod(n) for n = 195139795 and 195139804.

It is not an unprimeable number, because it can be changed into a prime (195139849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23132 + ... + 30419.

It is an arithmetic number, because the mean of its divisors is an integer number (28489664).

Almost surely, 2^195139844 is an apocalyptic number.

It is an amenable number.

195139844 is a deficient number, since it is larger than the sum of its proper divisors (146736124).

195139844 is a wasteful number, since it uses less digits than its factorization.

195139844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54466 (or 54464 counting only the distinct ones).

The product of its digits is 155520, while the sum is 44.

The square root of 195139844 is about 13969.2463647829. The cubic root of 195139844 is about 580.0275888581.

The spelling of 195139844 in words is "one hundred ninety-five million, one hundred thirty-nine thousand, eight hundred forty-four".