195670986 has 64 divisors (see below), whose sum is σ = 476513280. Its totient is φ = 52289280.

The previous prime is 195670961. The next prime is 195670991. The reversal of 195670986 is 689076591.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 127041 + ... + 128571.

It is an arithmetic number, because the mean of its divisors is an integer number (7445520).

Almost surely, 2^195670986 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 195670986, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (238256640).

195670986 is an abundant number, since it is smaller than the sum of its proper divisors (280842294).

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

195670986 is a wasteful number, since it uses less digits than its factorization.

195670986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1739.

The product of its (nonzero) digits is 816480, while the sum is 51.

The square root of 195670986 is about 13988.2445646335. The cubic root of 195670986 is about 580.5533620946.

The spelling of 195670986 in words is "one hundred ninety-five million, six hundred seventy thousand, nine hundred eighty-six".