8478836872 has 48 divisors (see below), whose sum is σ = 17493795900. Its totient is φ = 3849753600.

The previous prime is 8478836837. The next prime is 8478836893. The reversal of 8478836872 is 2786388748.

It can be written as a sum of positive squares in 2 ways, for example, as 8428341636 + 50495236 = 91806^2 + 7106^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 8478836872.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 972372 + ... + 981052.

Almost surely, 2^8478836872 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 8478836872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8746897950).

8478836872 is an abundant number, since it is smaller than the sum of its proper divisors (9014959028).

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

8478836872 is a wasteful number, since it uses less digits than its factorization.

8478836872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9718 (or 9703 counting only the distinct ones).

The product of its digits is 28901376, while the sum is 61.

The square root of 8478836872 is about 92080.5998677246. The cubic root of 8478836872 is about 2039.1324062871.

The spelling of 8478836872 in words is "eight billion, four hundred seventy-eight million, eight hundred thirty-six thousand, eight hundred seventy-two".