7913128 has 16 divisors (see below), whose sum is σ = 14928480. Its totient is φ = 3932208.

The previous prime is 7913117. The next prime is 7913159. The reversal of 7913128 is 8213197.

It is a self number, because there is not a number n which added to its sum of digits gives 7913128.

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, 1626 + ... + 4297.

It is an arithmetic number, because the mean of its divisors is an integer number (933030).

Almost surely, 2^7913128 is an apocalyptic number.

It is an amenable number.

7913128 is a deficient number, since it is larger than the sum of its proper divisors (7015352).

7913128 is a wasteful number, since it uses less digits than its factorization.

7913128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6096 (or 6092 counting only the distinct ones).

The product of its digits is 3024, while the sum is 31.

The square root of 7913128 is about 2813.0282615004. The cubic root of 7913128 is about 199.2734303457.

The spelling of 7913128 in words is "seven million, nine hundred thirteen thousand, one hundred twenty-eight".