3818547640 has 16 divisors (see below), whose sum is σ = 8591732280. Its totient is φ = 1527419040.

The previous prime is 3818547637. The next prime is 3818547643. The reversal of 3818547640 is 467458183.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (3818547637) and next prime (3818547643).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3818547643) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 47731806 + ... + 47731885.

Almost surely, 2^3818547640 is an apocalyptic number.

It is an amenable number.

3818547640 is an abundant number, since it is smaller than the sum of its proper divisors (4773184640).

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

3818547640 is a wasteful number, since it uses less digits than its factorization.

3818547640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95463702 (or 95463698 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 46.

The square root of 3818547640 is about 61794.3981279857. The cubic root of 3818547640 is about 1563.0255276734.

The spelling of 3818547640 in words is "three billion, eight hundred eighteen million, five hundred forty-seven thousand, six hundred forty".