165647328 has 96 divisors (see below), whose sum is σ = 542142720. Its totient is φ = 43023360.

The previous prime is 165647297. The next prime is 165647329. The reversal of 165647328 is 823746561.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 165647328.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165647329) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3813 + ... + 18596.

It is an arithmetic number, because the mean of its divisors is an integer number (5647320).

Almost surely, 2^165647328 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 165647328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (271071360).

165647328 is an abundant number, since it is smaller than the sum of its proper divisors (376495392).

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

165647328 is a wasteful number, since it uses less digits than its factorization.

165647328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22440 (or 22432 counting only the distinct ones).

The product of its digits is 241920, while the sum is 42.

The square root of 165647328 is about 12870.4051218289. The cubic root of 165647328 is about 549.1969857247.

It can be divided in two parts, 1656 and 47328, that added together give a palindrome (48984).

The spelling of 165647328 in words is "one hundred sixty-five million, six hundred forty-seven thousand, three hundred twenty-eight".