195447890 has 32 divisors (see below), whose sum is σ = 384422976. Its totient is φ = 70954560.

The previous prime is 195447881. The next prime is 195447953. The reversal of 195447890 is 98744591.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92789 + ... + 94871.

It is an arithmetic number, because the mean of its divisors is an integer number (12013218).

Almost surely, 2^195447890 is an apocalyptic number.

195447890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

195447890 is a deficient number, since it is larger than the sum of its proper divisors (188975086).

195447890 is a wasteful number, since it uses less digits than its factorization.

195447890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2954.

The product of its (nonzero) digits is 362880, while the sum is 47.

The square root of 195447890 is about 13980.2678801230. The cubic root of 195447890 is about 580.3326371746.

The spelling of 195447890 in words is "one hundred ninety-five million, four hundred forty-seven thousand, eight hundred ninety".