8747447820 has 48 divisors (see below), whose sum is σ = 24496926720. Its totient is φ = 2332264896.

The previous prime is 8747447803. The next prime is 8747447851. The reversal of 8747447820 is 287447478.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 656949 + ... + 670131.

It is an arithmetic number, because the mean of its divisors is an integer number (510352640).

Almost surely, 2^8747447820 is an apocalyptic number.

It is an amenable number.

8747447820 is an abundant number, since it is smaller than the sum of its proper divisors (15749478900).

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

8747447820 is a wasteful number, since it uses less digits than its factorization.

8747447820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24254 (or 24252 counting only the distinct ones).

The product of its (nonzero) digits is 2809856, while the sum is 51.

The square root of 8747447820 is about 93527.7916985107. The cubic root of 8747447820 is about 2060.4422825761.

The spelling of 8747447820 in words is "eight billion, seven hundred forty-seven million, four hundred forty-seven thousand, eight hundred twenty".