8389405872 has 60 divisors (see below), whose sum is σ = 24348276680. Its totient is φ = 2796467328.

The previous prime is 8389405861. The next prime is 8389405873. The reversal of 8389405872 is 2785049838.

It is a happy number.

8389405872 is a `hidden beast` number, since 83 + 89 + 405 + 87 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (8389405873) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1074997 + ... + 1082772.

Almost surely, 2^8389405872 is an apocalyptic number.

It is an amenable number.

8389405872 is an abundant number, since it is smaller than the sum of its proper divisors (15958870808).

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

8389405872 is a wasteful number, since it uses less digits than its factorization.

8389405872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2157792 (or 2157774 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 54.

The square root of 8389405872 is about 91593.6999580211. The cubic root of 8389405872 is about 2031.9377641777.

The spelling of 8389405872 in words is "eight billion, three hundred eighty-nine million, four hundred five thousand, eight hundred seventy-two".