7028640865 has 16 divisors (see below), whose sum is σ = 8643148416. Its totient is φ = 5483824000.

The previous prime is 7028640859. The next prime is 7028640893. The reversal of 7028640865 is 5680468207.

It is not a de Polignac number, because 7028640865 - 2¹¹ = 7028638817 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 908604 + ... + 916306.

It is an arithmetic number, because the mean of its divisors is an integer number (540196776).

Almost surely, 2^7028640865 is an apocalyptic number.

It is an amenable number.

7028640865 is a deficient number, since it is larger than the sum of its proper divisors (1614507551).

7028640865 is a wasteful number, since it uses less digits than its factorization.

7028640865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12200.

The product of its (nonzero) digits is 645120, while the sum is 46.

The square root of 7028640865 is about 83836.9898374220. The cubic root of 7028640865 is about 1915.5365851767.

The spelling of 7028640865 in words is "seven billion, twenty-eight million, six hundred forty thousand, eight hundred sixty-five".