188045 has 16 divisors (see below), whose sum is σ = 266112. Its totient is φ = 125760.

The previous prime is 188029. The next prime is 188107. The reversal of 188045 is 540881.

It is not a de Polignac number, because 188045 - 2⁴ = 188029 is a prime.

It is a super-3 number, since 3×188045³ = 19948333746573375, which contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 584 + ... + 846.

It is an arithmetic number, because the mean of its divisors is an integer number (16632).

2¹⁸⁸⁰⁴⁵ is an apocalyptic number.

It is an amenable number.

188045 is a deficient number, since it is larger than the sum of its proper divisors (78067).

188045 is a wasteful number, since it uses less digits than its factorization.

188045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292.

The product of its (nonzero) digits is 1280, while the sum is 26.

The square root of 188045 is about 433.6415570491. The cubic root of 188045 is about 57.2911135300.

Subtracting 188045 from its reverse (540881), we obtain a square (352836 = 594²).

The spelling of 188045 in words is "one hundred eighty-eight thousand, forty-five".