195657198 has 32 divisors (see below), whose sum is σ = 429062400. Its totient is φ = 58988160.

The previous prime is 195657179. The next prime is 195657223. The reversal of 195657198 is 891756591.

It is a super-2 number, since 2×195657198² = 76563478258422408, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 195657198.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5686 + ... + 20582.

It is an arithmetic number, because the mean of its divisors is an integer number (13408200).

Almost surely, 2^195657198 is an apocalyptic number.

195657198 is an abundant number, since it is smaller than the sum of its proper divisors (233405202).

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

195657198 is a wasteful number, since it uses less digits than its factorization.

195657198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15112.

The product of its digits is 680400, while the sum is 51.

The square root of 195657198 is about 13987.7517135528. The cubic root of 195657198 is about 580.5397254999.

The spelling of 195657198 in words is "one hundred ninety-five million, six hundred fifty-seven thousand, one hundred ninety-eight".