8409447672 has 64 divisors (see below), whose sum is σ = 21468252960. Its totient is φ = 2744102400.

The previous prime is 8409447661. The next prime is 8409447679. The reversal of 8409447672 is 2767449048.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8409447679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 579222 + ... + 593562.

Almost surely, 2^8409447672 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8409447672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10734126480).

8409447672 is an abundant number, since it is smaller than the sum of its proper divisors (13058805288).

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

8409447672 is a wasteful number, since it uses less digits than its factorization.

8409447672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14864 (or 14860 counting only the distinct ones).

The product of its (nonzero) digits is 2709504, while the sum is 51.

The square root of 8409447672 is about 91703.0406911352. The cubic root of 8409447672 is about 2033.5545375637.

The spelling of 8409447672 in words is "eight billion, four hundred nine million, four hundred forty-seven thousand, six hundred seventy-two".