165189984 has 48 divisors (see below), whose sum is σ = 444210480. Its totient is φ = 53719040.

The previous prime is 165189977. The next prime is 165189989. The reversal of 165189984 is 489981561.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165189989) 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, 17049 + ... + 24920.

It is an arithmetic number, because the mean of its divisors is an integer number (9254385).

Almost surely, 2^165189984 is an apocalyptic number.

It is an amenable number.

165189984 is an abundant number, since it is smaller than the sum of its proper divisors (279020496).

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

165189984 is a wasteful number, since it uses less digits than its factorization.

165189984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42023 (or 42015 counting only the distinct ones).

The product of its digits is 622080, while the sum is 51.

The square root of 165189984 is about 12852.6255683421. The cubic root of 165189984 is about 548.6910846994.

The spelling of 165189984 in words is "one hundred sixty-five million, one hundred eighty-nine thousand, nine hundred eighty-four".