797128556 has 24 divisors (see below), whose sum is σ = 1595121696. Its totient is φ = 341441280.

The previous prime is 797128543. The next prime is 797128559. The reversal of 797128556 is 655821797.

It is not an unprimeable number, because it can be changed into a prime (797128559) 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, 53300 + ... + 66596.

It is an arithmetic number, because the mean of its divisors is an integer number (66463404).

Almost surely, 2^797128556 is an apocalyptic number.

It is an amenable number.

797128556 is an abundant number, since it is smaller than the sum of its proper divisors (797993140).

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

797128556 is a wasteful number, since it uses less digits than its factorization.

797128556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15449 (or 15447 counting only the distinct ones).

The product of its digits is 1058400, while the sum is 50.

The square root of 797128556 is about 28233.4651787555. The cubic root of 797128556 is about 927.2057633525.

The spelling of 797128556 in words is "seven hundred ninety-seven million, one hundred twenty-eight thousand, five hundred fifty-six".