195988026 has 64 divisors (see below), whose sum is σ = 434907648. Its totient is φ = 58503168.

The previous prime is 195988007. The next prime is 195988063. The reversal of 195988026 is 620889591.

It is a happy number.

It is a super-2 number, since 2×195988026² = 76822612670753352, which contains 22 as substring.

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, 707400 + ... + 707676.

It is an arithmetic number, because the mean of its divisors is an integer number (6795432).

Almost surely, 2^195988026 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 195988026, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (217453824).

195988026 is an abundant number, since it is smaller than the sum of its proper divisors (238919622).

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

195988026 is a wasteful number, since it uses less digits than its factorization.

195988026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 535.

The product of its (nonzero) digits is 311040, while the sum is 48.

The square root of 195988026 is about 13999.5723506113. The cubic root of 195988026 is about 580.8667441358.

The spelling of 195988026 in words is "one hundred ninety-five million, nine hundred eighty-eight thousand, twenty-six".