165490432 has 36 divisors (see below), whose sum is σ = 338412816. Its totient is φ = 80721920.

The previous prime is 165490417. The next prime is 165490447. The reversal of 165490432 is 234094561.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (165490417) and next prime (165490447).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2613 + ... + 18379.

It is an arithmetic number, because the mean of its divisors is an integer number (9400356).

Almost surely, 2^165490432 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 165490432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (169206408).

165490432 is an abundant number, since it is smaller than the sum of its proper divisors (172922384).

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

165490432 is an equidigital number, since it uses as much as digits as its factorization.

165490432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15824 (or 15810 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 165490432 is about 12864.3084540134. The cubic root of 165490432 is about 549.0235368469.

The spelling of 165490432 in words is "one hundred sixty-five million, four hundred ninety thousand, four hundred thirty-two".