265289728 has 84 divisors (see below), whose sum is σ = 603979488. Its totient is φ = 115343360.

The previous prime is 265289699. The next prime is 265289753. The reversal of 265289728 is 827982562.

It is a happy number.

Its product of digits (967680) is a multiple of the sum of its prime divisors (36).

It is a nialpdrome in base 4 and base 16.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11534325 + ... + 11534347.

It is an arithmetic number, because the mean of its divisors is an integer number (7190232).

Almost surely, 2^265289728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 265289728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (301989744).

265289728 is an abundant number, since it is smaller than the sum of its proper divisors (338689760).

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

265289728 is an frugal number, since it uses more digits than its factorization.

265289728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74 (or 36 counting only the distinct ones).

The product of its digits is 967680, while the sum is 49.

The square root of 265289728 is about 16287.7170898810. The cubic root of 265289728 is about 642.5498277253.

The spelling of 265289728 in words is "two hundred sixty-five million, two hundred eighty-nine thousand, seven hundred twenty-eight".