8478473640 has 512 divisors, whose sum is σ = 33225292800. Its totient is φ = 1682472960.

The previous prime is 8478473639. The next prime is 8478473677. The reversal of 8478473640 is 463748748.

It is a happy number.

It is a hoax number, since the sum of its digits (51) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 12983554 + ... + 12984206.

It is an arithmetic number, because the mean of its divisors is an integer number (64893150).

Almost surely, 2^8478473640 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 8478473640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16612646400).

8478473640 is an abundant number, since it is smaller than the sum of its proper divisors (24746819160).

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

8478473640 is a wasteful number, since it uses less digits than its factorization.

8478473640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 757 (or 753 counting only the distinct ones).

The product of its (nonzero) digits is 3612672, while the sum is 51.

The square root of 8478473640 is about 92078.6274875989. The cubic root of 8478473640 is about 2039.1032871705.

The spelling of 8478473640 in words is "eight billion, four hundred seventy-eight million, four hundred seventy-three thousand, six hundred forty".