189669984 has 144 divisors (see below), whose sum is σ = 589556016. Its totient is φ = 53222400.

The previous prime is 189669979. The next prime is 189670001. The reversal of 189669984 is 489966981.

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 23 ways as a sum of consecutive naturals, for example, 286614 + ... + 287274.

It is an arithmetic number, because the mean of its divisors is an integer number (4094139).

Almost surely, 2^189669984 is an apocalyptic number.

189669984 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 189669984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (294778008).

189669984 is an abundant number, since it is smaller than the sum of its proper divisors (399886032).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

189669984 is a wasteful number, since it uses less digits than its factorization.

189669984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 749 (or 734 counting only the distinct ones).

The product of its digits is 6718464, while the sum is 60.

The square root of 189669984 is about 13772.0726109036. The cubic root of 189669984 is about 574.5566679773.

It can be divided in two parts, 189669 and 984, that added together give a triangular number (190653 = T₆₁₇).

The spelling of 189669984 in words is "one hundred eighty-nine million, six hundred sixty-nine thousand, nine hundred eighty-four".