165423804 has 288 divisors, whose sum is σ = 546981120. Its totient is φ = 38320128.

The previous prime is 165423803. The next prime is 165423827. The reversal of 165423804 is 408324561.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165423803) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2468979 + ... + 2469045.

It is an arithmetic number, because the mean of its divisors is an integer number (1899240).

Almost surely, 2^165423804 is an apocalyptic number.

165423804 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 165423804, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (273490560).

165423804 is an abundant number, since it is smaller than the sum of its proper divisors (381557316).

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

165423804 is a wasteful number, since it uses less digits than its factorization.

165423804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137 (or 128 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 33.

The square root of 165423804 is about 12861.7185476903. The cubic root of 165423804 is about 548.9498462815.

The spelling of 165423804 in words is "one hundred sixty-five million, four hundred twenty-three thousand, eight hundred four".