165851628 has 24 divisors (see below), whose sum is σ = 394290288. Its totient is φ = 54240576.

The previous prime is 165851617. The next prime is 165851629. The reversal of 165851628 is 826158561.

It is a self number, because there is not a number n which added to its sum of digits gives 165851628.

It is not an unprimeable number, because it can be changed into a prime (165851629) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129751 + ... + 131022.

It is an arithmetic number, because the mean of its divisors is an integer number (16428762).

Almost surely, 2^165851628 is an apocalyptic number.

It is an amenable number.

165851628 is an abundant number, since it is smaller than the sum of its proper divisors (228438660).

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

165851628 is a wasteful number, since it uses less digits than its factorization.

165851628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260833 (or 260831 counting only the distinct ones).

The product of its digits is 115200, while the sum is 42.

The square root of 165851628 is about 12878.3394892354. The cubic root of 165851628 is about 549.4226757488.

The spelling of 165851628 in words is "one hundred sixty-five million, eight hundred fifty-one thousand, six hundred twenty-eight".