8420711208 has 128 divisors (see below), whose sum is σ = 26803526400. Its totient is φ = 2144249856.

The previous prime is 8420711207. The next prime is 8420711209. The reversal of 8420711208 is 8021170248.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (8420711207) and next prime (8420711209).

It is not an unprimeable number, because it can be changed into a prime (8420711207) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3141 + ... + 129812.

It is an arithmetic number, because the mean of its divisors is an integer number (209402550).

Almost surely, 2^8420711208 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 8420711208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13401763200).

8420711208 is an abundant number, since it is smaller than the sum of its proper divisors (18382815192).

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

8420711208 is a wasteful number, since it uses less digits than its factorization.

8420711208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133011 (or 133007 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 33.

The square root of 8420711208 is about 91764.4332407714. The cubic root of 8420711208 is about 2034.4620405288.

The spelling of 8420711208 in words is "eight billion, four hundred twenty million, seven hundred eleven thousand, two hundred eight".