8309820672 has 72 divisors (see below), whose sum is σ = 24573622080. Its totient is φ = 2769937920.

The previous prime is 8309820667. The next prime is 8309820691. The reversal of 8309820672 is 2760289038.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is an unprimeable number.

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, 594204 + ... + 608027.

Almost surely, 2^8309820672 is an apocalyptic number.

It is an amenable number.

8309820672 is an abundant number, since it is smaller than the sum of its proper divisors (16263801408).

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

8309820672 is a wasteful number, since it uses less digits than its factorization.

8309820672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1202256 (or 1202236 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 8309820672 is about 91158.2177974098. The cubic root of 8309820672 is about 2025.4920856235.

The spelling of 8309820672 in words is "eight billion, three hundred nine million, eight hundred twenty thousand, six hundred seventy-two".