7728872 has 8 divisors (see below), whose sum is σ = 14491650. Its totient is φ = 3864432.

The previous prime is 7728871. The next prime is 7728907. The reversal of 7728872 is 2788277.

It can be written as a sum of positive squares in only one way, i.e., 7540516 + 188356 = 2746^2 + 434^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (7728871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 483047 + ... + 483062.

Almost surely, 2^7728872 is an apocalyptic number.

It is an amenable number.

7728872 is a deficient number, since it is larger than the sum of its proper divisors (6762778).

7728872 is a wasteful number, since it uses less digits than its factorization.

7728872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 966115 (or 966111 counting only the distinct ones).

The product of its digits is 87808, while the sum is 41.

The square root of 7728872 is about 2780.0848907902. The cubic root of 7728872 is about 197.7145838400.

The spelling of 7728872 in words is "seven million, seven hundred twenty-eight thousand, eight hundred seventy-two".