8397565988 has 12 divisors (see below), whose sum is σ = 16795132032. Its totient is φ = 3598956840.

The previous prime is 8397565963. The next prime is 8397565997. The reversal of 8397565988 is 8895657938.

8397565988 is an admirable number.

It is a super-2 number, since 2×8397565988² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 149956508 + ... + 149956563.

It is an arithmetic number, because the mean of its divisors is an integer number (1399594336).

Almost surely, 2^8397565988 is an apocalyptic number.

It is an amenable number.

8397565988 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

8397565988 is a wasteful number, since it uses less digits than its factorization.

8397565988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299913082 (or 299913080 counting only the distinct ones).

The product of its digits is 130636800, while the sum is 68.

The square root of 8397565988 is about 91638.2343129766. The cubic root of 8397565988 is about 2032.5963517314.

The spelling of 8397565988 in words is "eight billion, three hundred ninety-seven million, five hundred sixty-five thousand, nine hundred eighty-eight".