195842640 has 160 divisors (see below), whose sum is σ = 710240256. Its totient is φ = 43706880.

The previous prime is 195842627. The next prime is 195842651. The reversal of 195842640 is 46248591.

It is a congruent number.

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, 70885 + ... + 73595.

Almost surely, 2^195842640 is an apocalyptic number.

195842640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 195842640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (355120128).

195842640 is an abundant number, since it is smaller than the sum of its proper divisors (514397616).

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

195842640 is a wasteful number, since it uses less digits than its factorization.

195842640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2777 (or 2771 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 39.

The square root of 195842640 is about 13994.3788715327. The cubic root of 195842640 is about 580.7230775647.

The spelling of 195842640 in words is "one hundred ninety-five million, eight hundred forty-two thousand, six hundred forty".