165028280 has 64 divisors (see below), whose sum is σ = 388644480. Its totient is φ = 63001600.

The previous prime is 165028277. The next prime is 165028291. The reversal of 165028280 is 82820561.

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 15 ways as a sum of consecutive naturals, for example, 76010 + ... + 78150.

It is an arithmetic number, because the mean of its divisors is an integer number (6072570).

Almost surely, 2^165028280 is an apocalyptic number.

165028280 is a gapful number since it is divisible by the number (10) 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 165028280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (194322240).

165028280 is an abundant number, since it is smaller than the sum of its proper divisors (223616200).

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

165028280 is a wasteful number, since it uses less digits than its factorization.

165028280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2240 (or 2236 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 32.

The square root of 165028280 is about 12846.3333290087. Note that the first 4 decimals coincide. The cubic root of 165028280 is about 548.5119888733.

The spelling of 165028280 in words is "one hundred sixty-five million, twenty-eight thousand, two hundred eighty".