865112428 has 12 divisors (see below), whose sum is σ = 1542512160. Its totient is φ = 424394672.

The previous prime is 865112419. The next prime is 865112447. The reversal of 865112428 is 824211568.

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 3 ways as a sum of consecutive naturals, for example, 2040148 + ... + 2040571.

It is an arithmetic number, because the mean of its divisors is an integer number (128542680).

Almost surely, 2^865112428 is an apocalyptic number.

It is an amenable number.

865112428 is a deficient number, since it is larger than the sum of its proper divisors (677399732).

865112428 is a wasteful number, since it uses less digits than its factorization.

865112428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4080776 (or 4080774 counting only the distinct ones).

The product of its digits is 30720, while the sum is 37.

The square root of 865112428 is about 29412.7936109442. The cubic root of 865112428 is about 952.8492219327.

The spelling of 865112428 in words is "eight hundred sixty-five million, one hundred twelve thousand, four hundred twenty-eight".