7728328 has 8 divisors (see below), whose sum is σ = 14490630. Its totient is φ = 3864160.

The previous prime is 7728317. The next prime is 7728337. The reversal of 7728328 is 8238277.

It can be written as a sum of positive squares in only one way, i.e., 7518564 + 209764 = 2742^2 + 458^2 .

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

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 as a sum of consecutive naturals, namely, 483013 + ... + 483028.

Almost surely, 2^7728328 is an apocalyptic number.

It is an amenable number.

7728328 is a deficient number, since it is larger than the sum of its proper divisors (6762302).

7728328 is a wasteful number, since it uses less digits than its factorization.

7728328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 966047 (or 966043 counting only the distinct ones).

The product of its digits is 37632, while the sum is 37.

The square root of 7728328 is about 2779.9870503296. The cubic root of 7728328 is about 197.7099449890.

The spelling of 7728328 in words is "seven million, seven hundred twenty-eight thousand, three hundred twenty-eight".