8639474478 has 32 divisors (see below), whose sum is σ = 17336477184. Its totient is φ = 2870253792.

The previous prime is 8639474471. The next prime is 8639474491. The reversal of 8639474478 is 8744749368.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8639474471) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3262551 + ... + 3265197.

It is an arithmetic number, because the mean of its divisors is an integer number (541764912).

Almost surely, 2^8639474478 is an apocalyptic number.

8639474478 is an abundant number, since it is smaller than the sum of its proper divisors (8697002706).

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

8639474478 is a wasteful number, since it uses less digits than its factorization.

8639474478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4256.

The product of its digits is 32514048, while the sum is 60.

The square root of 8639474478 is about 92948.7734077217. The cubic root of 8639474478 is about 2051.9295319287.

The spelling of 8639474478 in words is "eight billion, six hundred thirty-nine million, four hundred seventy-four thousand, four hundred seventy-eight".