165490338 has 64 divisors (see below), whose sum is σ = 372556800. Its totient is φ = 48660480.

The previous prime is 165490331. The next prime is 165490349. The reversal of 165490338 is 833094561.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 165490296 and 165490305.

It is not an unprimeable number, because it can be changed into a prime (165490331) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 214818 + ... + 215586.

It is an arithmetic number, because the mean of its divisors is an integer number (5821200).

Almost surely, 2^165490338 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 165490338, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (186278400).

165490338 is an abundant number, since it is smaller than the sum of its proper divisors (207066462).

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

165490338 is a wasteful number, since it uses less digits than its factorization.

165490338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 907.

The product of its (nonzero) digits is 77760, while the sum is 39.

The square root of 165490338 is about 12864.3048004935. The cubic root of 165490338 is about 549.0234328968.

The spelling of 165490338 in words is "one hundred sixty-five million, four hundred ninety thousand, three hundred thirty-eight".