8321842872 has 72 divisors (see below), whose sum is σ = 26218062000. Its totient is φ = 2377668384.

The previous prime is 8321842853. The next prime is 8321842883. The reversal of 8321842872 is 2782481238.

8321842872 is a `hidden beast` number, since 8 + 3 + 218 + 428 + 7 + 2 = 666.

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

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1175872 + ... + 1182927.

It is an arithmetic number, because the mean of its divisors is an integer number (364139750).

Almost surely, 2^8321842872 is an apocalyptic number.

It is an amenable number.

8321842872 is an abundant number, since it is smaller than the sum of its proper divisors (17896219128).

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

8321842872 is a wasteful number, since it uses less digits than its factorization.

8321842872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2358825 (or 2358811 counting only the distinct ones).

The product of its digits is 344064, while the sum is 45.

The square root of 8321842872 is about 91224.1353590156. The cubic root of 8321842872 is about 2026.4684058181.

The spelling of 8321842872 in words is "eight billion, three hundred twenty-one million, eight hundred forty-two thousand, eight hundred seventy-two".