195850890 has 24 divisors (see below), whose sum is σ = 509212548. Its totient is φ = 52226880.

The previous prime is 195850883. The next prime is 195850909. The reversal of 195850890 is 98058591.

195850890 is a `hidden beast` number, since 1 + 9 + 58 + 508 + 90 = 666.

195850890 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 2 ways, for example, as 189695529 + 6155361 = 13773^2 + 2481^2 .

It is a super-2 number, since 2×195850890² = 76715142227584200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1087971 + ... + 1088150.

Almost surely, 2^195850890 is an apocalyptic number.

195850890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

195850890 is an abundant number, since it is smaller than the sum of its proper divisors (313361658).

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

195850890 is a wasteful number, since it uses less digits than its factorization.

195850890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2176134 (or 2176131 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 45.

The square root of 195850890 is about 13994.6736296350. The cubic root of 195850890 is about 580.7312318974.

The spelling of 195850890 in words is "one hundred ninety-five million, eight hundred fifty thousand, eight hundred ninety".