7728310945 has 16 divisors (see below), whose sum is σ = 9307707840. Its totient is φ = 6160204224.

The previous prime is 7728310921. The next prime is 7728310957. The reversal of 7728310945 is 5490138277.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7728310945 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7728310895 and 7728310904.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1721674 + ... + 1726156.

It is an arithmetic number, because the mean of its divisors is an integer number (581731740).

Almost surely, 2^7728310945 is an apocalyptic number.

It is an amenable number.

7728310945 is a deficient number, since it is larger than the sum of its proper divisors (1579396895).

7728310945 is a wasteful number, since it uses less digits than its factorization.

7728310945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5664.

The product of its (nonzero) digits is 423360, while the sum is 46.

The square root of 7728310945 is about 87910.8124464790. The cubic root of 7728310945 is about 1977.0979955241.

The spelling of 7728310945 in words is "seven billion, seven hundred twenty-eight million, three hundred ten thousand, nine hundred forty-five".