188065 has 8 divisors (see below), whose sum is σ = 233640. Its totient is φ = 145152.

The previous prime is 188029. The next prime is 188107. The reversal of 188065 is 560881.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 77841 + 110224 = 279^2 + 332^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 188065 - 2¹⁷ = 56993 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 504 + ... + 793.

It is an arithmetic number, because the mean of its divisors is an integer number (29205).

2¹⁸⁸⁰⁶⁵ is an apocalyptic number.

It is an amenable number.

188065 is a deficient number, since it is larger than the sum of its proper divisors (45575).

188065 is a wasteful number, since it uses less digits than its factorization.

188065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1331.

The product of its (nonzero) digits is 1920, while the sum is 28.

The square root of 188065 is about 433.6646169565. The cubic root of 188065 is about 57.2931445716.

Subtracting 188065 from its reverse (560881), we obtain a triangular number (372816 = T₈₆₃).

The spelling of 188065 in words is "one hundred eighty-eight thousand, sixty-five".