7998656 has 14 divisors (see below), whose sum is σ = 15872460. Its totient is φ = 3999296.

The previous prime is 7998643. The next prime is 7998659. The reversal of 7998656 is 6568997.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (7998659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62426 + ... + 62553.

Almost surely, 2^7998656 is an apocalyptic number.

It is an amenable number.

7998656 is a deficient number, since it is larger than the sum of its proper divisors (7873804).

7998656 is a wasteful number, since it uses less digits than its factorization.

7998656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124991 (or 124981 counting only the distinct ones).

The product of its digits is 816480, while the sum is 50.

The square root of 7998656 is about 2828.1895268882. The cubic root of 7998656 is about 199.9887993727.

The spelling of 7998656 in words is "seven million, nine hundred ninety-eight thousand, six hundred fifty-six".