8569640438 has 16 divisors (see below), whose sum is σ = 12976191360. Its totient is φ = 4244290176.

The previous prime is 8569640413. The next prime is 8569640441. The reversal of 8569640438 is 8340469658.

It is a self number, because there is not a number n which added to its sum of digits gives 8569640438.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 386756 + ... + 408312.

It is an arithmetic number, because the mean of its divisors is an integer number (811011960).

Almost surely, 2^8569640438 is an apocalyptic number.

8569640438 is a deficient number, since it is larger than the sum of its proper divisors (4406550922).

8569640438 is a wasteful number, since it uses less digits than its factorization.

8569640438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23431.

The product of its (nonzero) digits is 4976640, while the sum is 53.

The square root of 8569640438 is about 92572.3524493139. The cubic root of 8569640438 is about 2046.3858937424.

The spelling of 8569640438 in words is "eight billion, five hundred sixty-nine million, six hundred forty thousand, four hundred thirty-eight".