190305 has 12 divisors (see below), whose sum is σ = 329940. Its totient is φ = 101472.

The previous prime is 190301. The next prime is 190313. The reversal of 190305 is 503091.

It can be written as a sum of positive squares in 2 ways, for example, as 147456 + 42849 = 384^2 + 207^2 .

It is not a de Polignac number, because 190305 - 2² = 190301 is a prime.

It is not an unprimeable number, because it can be changed into a prime (190301) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2070 + ... + 2159.

It is an arithmetic number, because the mean of its divisors is an integer number (27495).

2¹⁹⁰³⁰⁵ is an apocalyptic number.

190305 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

190305 is a deficient number, since it is larger than the sum of its proper divisors (139635).

190305 is a wasteful number, since it uses less digits than its factorization.

190305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4240 (or 4237 counting only the distinct ones).

The product of its (nonzero) digits is 135, while the sum is 18.

The square root of 190305 is about 436.2396130569. The cubic root of 190305 is about 57.5197159862.

Adding to 190305 its reverse (503091), we get a palindrome (693396).

The spelling of 190305 in words is "one hundred ninety thousand, three hundred five".