8509238040 has 64 divisors (see below), whose sum is σ = 25578050400. Its totient is φ = 2264655872.

The previous prime is 8509238009. The next prime is 8509238063. The reversal of 8509238040 is 408329058.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 8509238040.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 8577 + ... + 130736.

Almost surely, 2^8509238040 is an apocalyptic number.

It is an amenable number.

8509238040 is an abundant number, since it is smaller than the sum of its proper divisors (17068812360).

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

8509238040 is a wasteful number, since it uses less digits than its factorization.

8509238040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139836 (or 139832 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 39.

The square root of 8509238040 is about 92245.5312738780. The cubic root of 8509238040 is about 2041.5666262759.

The spelling of 8509238040 in words is "eight billion, five hundred nine million, two hundred thirty-eight thousand, forty".