189908 has 12 divisors (see below), whose sum is σ = 335412. Its totient is φ = 94080.

The previous prime is 189901. The next prime is 189913. The reversal of 189908 is 809981.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 169744 + 20164 = 412^2 + 142^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189901) by changing a digit.

189908 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 668 + ... + 908.

It is an arithmetic number, because the mean of its divisors is an integer number (27951).

2¹⁸⁹⁹⁰⁸ is an apocalyptic number.

It is an amenable number.

189908 is a deficient number, since it is larger than the sum of its proper divisors (145504).

189908 is a wasteful number, since it uses less digits than its factorization.

189908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 442 (or 440 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 35.

The square root of 189908 is about 435.7843503386. The cubic root of 189908 is about 57.4796903698.

The spelling of 189908 in words is "one hundred eighty-nine thousand, nine hundred eight".