165383424 has 144 divisors (see below), whose sum is σ = 497427840. Its totient is φ = 54190080.

The previous prime is 165383423. The next prime is 165383443. The reversal of 165383424 is 424383561.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165383423) 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, 490584 + ... + 490920.

It is an arithmetic number, because the mean of its divisors is an integer number (3454360).

Almost surely, 2^165383424 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 165383424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (248713920).

165383424 is an abundant number, since it is smaller than the sum of its proper divisors (332044416).

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

165383424 is an equidigital number, since it uses as much as digits as its factorization.

165383424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433 (or 413 counting only the distinct ones).

The product of its digits is 69120, while the sum is 36.

The square root of 165383424 is about 12860.1486772121. The cubic root of 165383424 is about 548.9051763728.

The spelling of 165383424 in words is "one hundred sixty-five million, three hundred eighty-three thousand, four hundred twenty-four".