7928865 has 24 divisors (see below), whose sum is σ = 15707328. Its totient is φ = 3624480.

The previous prime is 7928863. The next prime is 7928881. The reversal of 7928865 is 5688297.

7928865 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 7928865 - 2¹ = 7928863 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 7928865.

It is not an unprimeable number, because it can be changed into a prime (7928863) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12271 + ... + 12900.

It is an arithmetic number, because the mean of its divisors is an integer number (654472).

Almost surely, 2^7928865 is an apocalyptic number.

It is an amenable number.

7928865 is a deficient number, since it is larger than the sum of its proper divisors (7778463).

7928865 is a wasteful number, since it uses less digits than its factorization.

7928865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25189 (or 25186 counting only the distinct ones).

The product of its digits is 241920, while the sum is 45.

The square root of 7928865 is about 2815.8240356954. The cubic root of 7928865 is about 199.4054425922.

The spelling of 7928865 in words is "seven million, nine hundred twenty-eight thousand, eight hundred sixty-five".