188945 has 16 divisors (see below), whose sum is σ = 248832. Its totient is φ = 137280.

The previous prime is 188941. The next prime is 188953. The reversal of 188945 is 549881.

It is not a de Polignac number, because 188945 - 2² = 188941 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 188945.

It is not an unprimeable number, because it can be changed into a prime (188941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3539 + ... + 3591.

It is an arithmetic number, because the mean of its divisors is an integer number (15552).

2¹⁸⁸⁹⁴⁵ is an apocalyptic number.

It is an amenable number.

188945 is a deficient number, since it is larger than the sum of its proper divisors (59887).

188945 is a wasteful number, since it uses less digits than its factorization.

188945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112.

The product of its digits is 11520, while the sum is 35.

The square root of 188945 is about 434.6780417734. The cubic root of 188945 is about 57.3823682121.

The spelling of 188945 in words is "one hundred eighty-eight thousand, nine hundred forty-five".