7928665 has 8 divisors (see below), whose sum is σ = 9717120. Its totient is φ = 6207792.

The previous prime is 7928651. The next prime is 7928671. The reversal of 7928665 is 5668297.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7928665 - 2⁹ = 7928153 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16635 + ... + 17104.

It is an arithmetic number, because the mean of its divisors is an integer number (1214640).

Almost surely, 2^7928665 is an apocalyptic number.

It is an amenable number.

7928665 is a deficient number, since it is larger than the sum of its proper divisors (1788455).

7928665 is a wasteful number, since it uses less digits than its factorization.

7928665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33791.

The product of its digits is 181440, while the sum is 43.

The square root of 7928665 is about 2815.7885218887. The cubic root of 7928665 is about 199.4037659578.

The spelling of 7928665 in words is "seven million, nine hundred twenty-eight thousand, six hundred sixty-five".