7975728107 has 4 divisors (see below), whose sum is σ = 8161210200. Its totient is φ = 7790246016.

The previous prime is 7975728091. The next prime is 7975728119. The reversal of 7975728107 is 7018275797.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 7975728107 - 2⁴ = 7975728091 is a prime.

It is a super-2 number, since 2×7975728107² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7975728127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92740982 + ... + 92741067.

It is an arithmetic number, because the mean of its divisors is an integer number (2040302550).

Almost surely, 2^7975728107 is an apocalyptic number.

7975728107 is a deficient number, since it is larger than the sum of its proper divisors (185482093).

7975728107 is a wasteful number, since it uses less digits than its factorization.

7975728107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185482092.

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

The square root of 7975728107 is about 89306.9320209803. The cubic root of 7975728107 is about 1997.9752932229.

The spelling of 7975728107 in words is "seven billion, nine hundred seventy-five million, seven hundred twenty-eight thousand, one hundred seven".