195643240 has 32 divisors (see below), whose sum is σ = 474059880. Its totient is φ = 72237312.

The previous prime is 195643223. The next prime is 195643289. The reversal of 195643240 is 42346591.

It is a happy number.

195643240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 172081924 + 23561316 = 13118^2 + 4854^2 .

It is a junction number, because it is equal to n+sod(n) for n = 195643196 and 195643205.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 187599 + ... + 188638.

Almost surely, 2^195643240 is an apocalyptic number.

195643240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

195643240 is an abundant number, since it is smaller than the sum of its proper divisors (278416640).

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

195643240 is a wasteful number, since it uses less digits than its factorization.

195643240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376261 (or 376257 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 195643240 is about 13987.2527681457. The cubic root of 195643240 is about 580.5259201194.

The spelling of 195643240 in words is "one hundred ninety-five million, six hundred forty-three thousand, two hundred forty".