188689685 has 8 divisors (see below), whose sum is σ = 228544416. Its totient is φ = 149540560.

The previous prime is 188689679. The next prime is 188689687. The reversal of 188689685 is 586986881.

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

It is not a de Polignac number, because 188689685 - 2⁸ = 188689429 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (188689687) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 175811 + ... + 176880.

It is an arithmetic number, because the mean of its divisors is an integer number (28568052).

Almost surely, 2^188689685 is an apocalyptic number.

It is an amenable number.

188689685 is a deficient number, since it is larger than the sum of its proper divisors (39854731).

188689685 is a wasteful number, since it uses less digits than its factorization.

188689685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352803.

The product of its digits is 6635520, while the sum is 59.

The square root of 188689685 is about 13736.4364010467. The cubic root of 188689685 is about 573.5651027599.

The spelling of 188689685 in words is "one hundred eighty-eight million, six hundred eighty-nine thousand, six hundred eighty-five".