8218134340 has 48 divisors (see below), whose sum is σ = 18598508208. Its totient is φ = 3032285184.

The previous prime is 8218134283. The next prime is 8218134371. The reversal of 8218134340 is 434318128.

It can be written as a sum of positive squares in 8 ways, for example, as 2329413696 + 5888720644 = 48264^2 + 76738^2 .

It is a junction number, because it is equal to n+sod(n) for n = 8218134296 and 8218134305.

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, 393604 + ... + 413956.

It is an arithmetic number, because the mean of its divisors is an integer number (387468921).

Almost surely, 2^8218134340 is an apocalyptic number.

It is an amenable number.

8218134340 is an abundant number, since it is smaller than the sum of its proper divisors (10380373868).

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

8218134340 is a wasteful number, since it uses less digits than its factorization.

8218134340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21928 (or 21926 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 34.

The square root of 8218134340 is about 90653.9262249573. The cubic root of 8218134340 is about 2018.0151024836.

The spelling of 8218134340 in words is "eight billion, two hundred eighteen million, one hundred thirty-four thousand, three hundred forty".