8420745860 has 48 divisors (see below), whose sum is σ = 17766069552. Its totient is φ = 3352627200.

The previous prime is 8420745803. The next prime is 8420745911. The reversal of 8420745860 is 685470248.

It can be written as a sum of positive squares in 8 ways, for example, as 2536935424 + 5883810436 = 50368^2 + 76706^2 .

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4802744 + ... + 4804496.

It is an arithmetic number, because the mean of its divisors is an integer number (370126449).

Almost surely, 2^8420745860 is an apocalyptic number.

It is an amenable number.

8420745860 is an abundant number, since it is smaller than the sum of its proper divisors (9345323692).

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

8420745860 is a wasteful number, since it uses less digits than its factorization.

8420745860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2744 (or 2742 counting only the distinct ones).

The product of its (nonzero) digits is 430080, while the sum is 44.

The square root of 8420745860 is about 91764.6220501125. The cubic root of 8420745860 is about 2034.4648311910.

The spelling of 8420745860 in words is "eight billion, four hundred twenty million, seven hundred forty-five thousand, eight hundred sixty".