195440000 has 160 divisors (see below), whose sum is σ = 557634000. Its totient is φ = 66816000.

The previous prime is 195439997. The next prime is 195440029. The reversal of 195440000 is 44591.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (160).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 559826 + ... + 560174.

Almost surely, 2^195440000 is an apocalyptic number.

195440000 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 195440000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (278817000).

195440000 is an abundant number, since it is smaller than the sum of its proper divisors (362194000).

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

195440000 is an frugal number, since it uses more digits than its factorization.

195440000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390 (or 363 counting only the distinct ones).

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

The square root of 195440000 is about 13979.9856938410. The cubic root of 195440000 is about 580.3248279556.

Adding to 195440000 its reverse (44591), we get a palindrome (195484591).

The spelling of 195440000 in words is "one hundred ninety-five million, four hundred forty thousand".