7728664 has 16 divisors (see below), whose sum is σ = 14845320. Its totient is φ = 3769920.

The previous prime is 7728647. The next prime is 7728673. The reversal of 7728664 is 4668277.

It is a congruent number.

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, 11454 + ... + 12109.

Almost surely, 2^7728664 is an apocalyptic number.

It is an amenable number.

7728664 is a deficient number, since it is larger than the sum of its proper divisors (7116656).

7728664 is a wasteful number, since it uses less digits than its factorization.

7728664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23610 (or 23606 counting only the distinct ones).

The product of its digits is 112896, while the sum is 40.

The square root of 7728664 is about 2780.0474816089. The cubic root of 7728664 is about 197.7128101874.

The spelling of 7728664 in words is "seven million, seven hundred twenty-eight thousand, six hundred sixty-four".