195440 has 40 divisors (see below), whose sum is σ = 520800. Its totient is φ = 66816.

The previous prime is 195427. The next prime is 195443. The reversal of 195440 is 44591.

It is a happy number.

195440 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 195440.

It is not an unprimeable number, because it can be changed into a prime (195443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 386 + ... + 734.

It is an arithmetic number, because the mean of its divisors is an integer number (13020).

2¹⁹⁵⁴⁴⁰ is an apocalyptic number.

195440 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 195440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (260400).

195440 is an abundant number, since it is smaller than the sum of its proper divisors (325360).

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

195440 is a wasteful number, since it uses less digits than its factorization.

195440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 369 (or 363 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 195440 is about 442.0859644911. The cubic root of 195440 is about 58.0324827956.

The spelling of 195440 in words is "one hundred ninety-five thousand, four hundred forty".