189664 has 12 divisors (see below), whose sum is σ = 373464. Its totient is φ = 94816.

The previous prime is 189661. The next prime is 189671. The reversal of 189664 is 466981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2932 + ... + 2995.

It is an arithmetic number, because the mean of its divisors is an integer number (31122).

2¹⁸⁹⁶⁶⁴ is an apocalyptic number.

It is an amenable number.

189664 is a deficient number, since it is larger than the sum of its proper divisors (183800).

189664 is an equidigital number, since it uses as much as digits as its factorization.

189664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5937 (or 5929 counting only the distinct ones).

The product of its digits is 10368, while the sum is 34.

The square root of 189664 is about 435.5043053748. The cubic root of 189664 is about 57.4550625582.

The spelling of 189664 in words is "one hundred eighty-nine thousand, six hundred sixty-four".