195831396 has 72 divisors (see below), whose sum is σ = 507891384. Its totient is φ = 63598080.

The previous prime is 195831367. The next prime is 195831409. The reversal of 195831396 is 693138591.

It can be written as a sum of positive squares in 4 ways, for example, as 84824100 + 111007296 = 9210^2 + 10536^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 375616 + ... + 376136.

It is an arithmetic number, because the mean of its divisors is an integer number (7054047).

Almost surely, 2^195831396 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 195831396, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (253945692).

195831396 is an abundant number, since it is smaller than the sum of its proper divisors (312059988).

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

195831396 is a wasteful number, since it uses less digits than its factorization.

195831396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 781 (or 776 counting only the distinct ones).

The product of its digits is 174960, while the sum is 45.

The square root of 195831396 is about 13993.9771330383. The cubic root of 195831396 is about 580.7119635818.

The spelling of 195831396 in words is "one hundred ninety-five million, eight hundred thirty-one thousand, three hundred ninety-six".