7728006785 has 16 divisors (see below), whose sum is σ = 9683521920. Its totient is φ = 5909502720.

The previous prime is 7728006779. The next prime is 7728006787. The reversal of 7728006785 is 5876008277.

It is not a de Polignac number, because 7728006785 - 2⁶ = 7728006721 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7728006787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 148670 + ... + 193800.

It is an arithmetic number, because the mean of its divisors is an integer number (605220120).

Almost surely, 2^7728006785 is an apocalyptic number.

It is an amenable number.

7728006785 is a deficient number, since it is larger than the sum of its proper divisors (1955515135).

7728006785 is a wasteful number, since it uses less digits than its factorization.

7728006785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46648.

The product of its (nonzero) digits is 1317120, while the sum is 50.

The square root of 7728006785 is about 87909.0824943589. The cubic root of 7728006785 is about 1977.0720579024.

The spelling of 7728006785 in words is "seven billion, seven hundred twenty-eight million, six thousand, seven hundred eighty-five".