7915770728 has 32 divisors (see below), whose sum is σ = 15629772000. Its totient is φ = 3748006080.

The previous prime is 7915770727. The next prime is 7915770743. The reversal of 7915770728 is 8270775197.

It is a self number, because there is not a number n which added to its sum of digits gives 7915770728.

It is not an unprimeable number, because it can be changed into a prime (7915770721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 405578 + ... + 424646.

It is an arithmetic number, because the mean of its divisors is an integer number (488430375).

Almost surely, 2^7915770728 is an apocalyptic number.

It is an amenable number.

7915770728 is a deficient number, since it is larger than the sum of its proper divisors (7714001272).

7915770728 is a wasteful number, since it uses less digits than its factorization.

7915770728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21825 (or 21821 counting only the distinct ones).

The product of its (nonzero) digits is 1728720, while the sum is 53.

The square root of 7915770728 is about 88970.6172171465. The cubic root of 7915770728 is about 1992.9561149661.

The spelling of 7915770728 in words is "seven billion, nine hundred fifteen million, seven hundred seventy thousand, seven hundred twenty-eight".