195779020 has 12 divisors (see below), whose sum is σ = 411135984. Its totient is φ = 78311600.

The previous prime is 195778993. The next prime is 195779033. The reversal of 195779020 is 20977591.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4894456 + ... + 4894495.

It is an arithmetic number, because the mean of its divisors is an integer number (34261332).

Almost surely, 2^195779020 is an apocalyptic number.

195779020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

195779020 is an abundant number, since it is smaller than the sum of its proper divisors (215356964).

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

195779020 is a wasteful number, since it uses less digits than its factorization.

195779020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9788960 (or 9788958 counting only the distinct ones).

The product of its (nonzero) digits is 39690, while the sum is 40.

The square root of 195779020 is about 13992.1056313909. The cubic root of 195779020 is about 580.6601876113.

The spelling of 195779020 in words is "one hundred ninety-five million, seven hundred seventy-nine thousand, twenty".