7945918728 has 64 divisors (see below), whose sum is σ = 22945446720. Its totient is φ = 2266214400.

The previous prime is 7945918723. The next prime is 7945918741. The reversal of 7945918728 is 8278195497.

It is a super-2 number, since 2×7945918728² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7945918723) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 880753 + ... + 889728.

It is an arithmetic number, because the mean of its divisors is an integer number (358522605).

Almost surely, 2^7945918728 is an apocalyptic number.

It is an amenable number.

7945918728 is an abundant number, since it is smaller than the sum of its proper divisors (14999527992).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7945918728 is a wasteful number, since it uses less digits than its factorization.

7945918728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1770518 (or 1770514 counting only the distinct ones).

The product of its digits is 10160640, while the sum is 60.

The square root of 7945918728 is about 89139.8829256579. The cubic root of 7945918728 is about 1995.4830335202.

The spelling of 7945918728 in words is "seven billion, nine hundred forty-five million, nine hundred eighteen thousand, seven hundred twenty-eight".