8120847400 has 48 divisors (see below), whose sum is σ = 18890353440. Its totient is φ = 3246724800.

The previous prime is 8120847377. The next prime is 8120847401. The reversal of 8120847400 is 47480218.

It is not an unprimeable number, because it can be changed into a prime (8120847401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 444445 + ... + 462355.

It is an arithmetic number, because the mean of its divisors is an integer number (393549030).

Almost surely, 2^8120847400 is an apocalyptic number.

It is an amenable number.

8120847400 is an abundant number, since it is smaller than the sum of its proper divisors (10769506040).

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

8120847400 is a wasteful number, since it uses less digits than its factorization.

8120847400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20194 (or 20185 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 34.

The square root of 8120847400 is about 90115.7444623302. The cubic root of 8120847400 is about 2010.0203293242.

The spelling of 8120847400 in words is "eight billion, one hundred twenty million, eight hundred forty-seven thousand, four hundred".