165289028 has 12 divisors (see below), whose sum is σ = 306270972. Its totient is φ = 77783040.

The previous prime is 165289021. The next prime is 165289039. The reversal of 165289028 is 820982561.

It can be written as a sum of positive squares in 2 ways, for example, as 106337344 + 58951684 = 10312^2 + 7678^2 .

It is not an unprimeable number, because it can be changed into a prime (165289021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1215293 + ... + 1215428.

It is an arithmetic number, because the mean of its divisors is an integer number (25522581).

Almost surely, 2^165289028 is an apocalyptic number.

It is an amenable number.

165289028 is a deficient number, since it is larger than the sum of its proper divisors (140981944).

165289028 is a wasteful number, since it uses less digits than its factorization.

165289028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2430742 (or 2430740 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 41.

The square root of 165289028 is about 12856.4780558285. The cubic root of 165289028 is about 548.8007235142.

The spelling of 165289028 in words is "one hundred sixty-five million, two hundred eighty-nine thousand, twenty-eight".