7728915916 has 6 divisors (see below), whose sum is σ = 13525602860. Its totient is φ = 3864457956.

The previous prime is 7728915833. The next prime is 7728915917. The reversal of 7728915916 is 6195198277.

It is a happy number.

It is a super-2 number, since 2×7728915916² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7728915917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 966114486 + ... + 966114493.

Almost surely, 2^7728915916 is an apocalyptic number.

It is an amenable number.

7728915916 is a deficient number, since it is larger than the sum of its proper divisors (5796686944).

7728915916 is a wasteful number, since it uses less digits than its factorization.

7728915916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1932228983 (or 1932228981 counting only the distinct ones).

The product of its digits is 1905120, while the sum is 55.

The square root of 7728915916 is about 87914.2532016282. The cubic root of 7728915916 is about 1977.1495831543.

The spelling of 7728915916 in words is "seven billion, seven hundred twenty-eight million, nine hundred fifteen thousand, nine hundred sixteen".