8218708840 has 32 divisors (see below), whose sum is σ = 19088616960. Its totient is φ = 3181435200.

The previous prime is 8218708807. The next prime is 8218708843. The reversal of 8218708840 is 488078128.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (8218708843) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3312756 + ... + 3315235.

It is an arithmetic number, because the mean of its divisors is an integer number (596519280).

Almost surely, 2^8218708840 is an apocalyptic number.

It is an amenable number.

8218708840 is an abundant number, since it is smaller than the sum of its proper divisors (10869908120).

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

8218708840 is a wasteful number, since it uses less digits than its factorization.

8218708840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6628033 (or 6628029 counting only the distinct ones).

The product of its (nonzero) digits is 229376, while the sum is 46.

The square root of 8218708840 is about 90657.0948133680. The cubic root of 8218708840 is about 2018.0621254296.

The spelling of 8218708840 in words is "eight billion, two hundred eighteen million, seven hundred eight thousand, eight hundred forty".