865628288 has 64 divisors (see below), whose sum is σ = 1989489600. Its totient is φ = 367475712.

The previous prime is 865628273. The next prime is 865628303. The reversal of 865628288 is 882826568.

It is an interprime number because it is at equal distance from previous prime (865628273) and next prime (865628303).

It is a tau number, because it is divible by the number of its divisors (64).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91358 + ... + 100386.

It is an arithmetic number, because the mean of its divisors is an integer number (31085775).

Almost surely, 2^865628288 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 865628288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (994744800).

865628288 is an abundant number, since it is smaller than the sum of its proper divisors (1123861312).

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

865628288 is a wasteful number, since it uses less digits than its factorization.

865628288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9157 (or 9145 counting only the distinct ones).

The product of its digits is 2949120, while the sum is 53.

The square root of 865628288 is about 29421.5616172901. The cubic root of 865628288 is about 953.0385765631.

The spelling of 865628288 in words is "eight hundred sixty-five million, six hundred twenty-eight thousand, two hundred eighty-eight".