7989915 has 16 divisors (see below), whose sum is σ = 13536288. Its totient is φ = 4010496.

The previous prime is 7989907. The next prime is 7989929. The reversal of 7989915 is 5199897.

It is not a de Polignac number, because 7989915 - 2³ = 7989907 is a prime.

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, 15412 + ... + 15921.

It is an arithmetic number, because the mean of its divisors is an integer number (846018).

Almost surely, 2^7989915 is an apocalyptic number.

7989915 is a deficient number, since it is larger than the sum of its proper divisors (5546373).

7989915 is a wasteful number, since it uses less digits than its factorization.

7989915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31358.

The product of its digits is 204120, while the sum is 48.

The square root of 7989915 is about 2826.6437695614. The cubic root of 7989915 is about 199.9159229936.

The spelling of 7989915 in words is "seven million, nine hundred eighty-nine thousand, nine hundred fifteen".