195642380 has 24 divisors (see below), whose sum is σ = 413376432. Its totient is φ = 77775552.

The previous prime is 195642379. The next prime is 195642401. The reversal of 195642380 is 83246591.

It is a happy number.

It is an unprimeable number.

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, 26747 + ... + 33266.

It is an arithmetic number, because the mean of its divisors is an integer number (17224018).

Almost surely, 2^195642380 is an apocalyptic number.

195642380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

195642380 is an abundant number, since it is smaller than the sum of its proper divisors (217734052).

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

195642380 is a wasteful number, since it uses less digits than its factorization.

195642380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60185 (or 60183 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 195642380 is about 13987.2220258349. Note that the first 3 decimals coincide. The cubic root of 195642380 is about 580.5250695013.

The spelling of 195642380 in words is "one hundred ninety-five million, six hundred forty-two thousand, three hundred eighty".