195778 has 12 divisors (see below), whose sum is σ = 323190. Its totient is φ = 88880.

The previous prime is 195761. The next prime is 195781. The reversal of 195778 is 877591.

It can be written as a sum of positive squares in only one way, i.e., 131769 + 64009 = 363^2 + 253^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 163 + ... + 646.

2¹⁹⁵⁷⁷⁸ is an apocalyptic number.

195778 is a deficient number, since it is larger than the sum of its proper divisors (127412).

195778 is a wasteful number, since it uses less digits than its factorization.

195778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 833 (or 822 counting only the distinct ones).

The product of its digits is 17640, while the sum is 37.

The square root of 195778 is about 442.4680779446. The cubic root of 195778 is about 58.0659179205.

The spelling of 195778 in words is "one hundred ninety-five thousand, seven hundred seventy-eight".