195780126 has 32 divisors (see below), whose sum is σ = 415192608. Its totient is φ = 61332480.

The previous prime is 195780089. The next prime is 195780133. The reversal of 195780126 is 621087591.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 134016 + ... + 135468.

It is an arithmetic number, because the mean of its divisors is an integer number (12974769).

Almost surely, 2^195780126 is an apocalyptic number.

195780126 is an abundant number, since it is smaller than the sum of its proper divisors (219412482).

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

195780126 is a wasteful number, since it uses less digits than its factorization.

195780126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2796.

The product of its (nonzero) digits is 30240, while the sum is 39.

The square root of 195780126 is about 13992.1451536210. The cubic root of 195780126 is about 580.6612810362.

The spelling of 195780126 in words is "one hundred ninety-five million, seven hundred eighty thousand, one hundred twenty-six".