8186819240 has 16 divisors (see below), whose sum is σ = 18420343380. Its totient is φ = 3274727680.

The previous prime is 8186819239. The next prime is 8186819243. The reversal of 8186819240 is 429186818.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 8180478916 + 6340324 = 90446^2 + 2518^2 .

It is not an unprimeable number, because it can be changed into a prime (8186819243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102335201 + ... + 102335280.

Almost surely, 2^8186819240 is an apocalyptic number.

It is an amenable number.

8186819240 is an abundant number, since it is smaller than the sum of its proper divisors (10233524140).

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

8186819240 is a wasteful number, since it uses less digits than its factorization.

8186819240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204670492 (or 204670488 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 47.

The square root of 8186819240 is about 90481.0435395172. The cubic root of 8186819240 is about 2015.4486326271.

The spelling of 8186819240 in words is "eight billion, one hundred eighty-six million, eight hundred nineteen thousand, two hundred forty".