195309190 has 16 divisors (see below), whose sum is σ = 357320880. Its totient is φ = 76842720.

The previous prime is 195309181. The next prime is 195309193. The reversal of 195309190 is 91903591.

It is a super-2 number, since 2×195309190² = 76291359396912200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195309193) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 159480 + ... + 160699.

It is an arithmetic number, because the mean of its divisors is an integer number (22332555).

Almost surely, 2^195309190 is an apocalyptic number.

195309190 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

195309190 is a deficient number, since it is larger than the sum of its proper divisors (162011690).

195309190 is a wasteful number, since it uses less digits than its factorization.

195309190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320247.

The product of its (nonzero) digits is 10935, while the sum is 37.

The square root of 195309190 is about 13975.3064367119. The cubic root of 195309190 is about 580.1953266025.

The spelling of 195309190 in words is "one hundred ninety-five million, three hundred nine thousand, one hundred ninety".