3138845568 has 128 divisors (see below), whose sum is σ = 8619138720. Its totient is φ = 1011326976.

The previous prime is 3138845491. The next prime is 3138845639. The reversal of 3138845568 is 8655488313.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (128).

It is a self number, because there is not a number n which added to its sum of digits gives 3138845568.

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, 2457346 + ... + 2458622.

Almost surely, 2^3138845568 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3138845568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4309569360).

3138845568 is an abundant number, since it is smaller than the sum of its proper divisors (5480293152).

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

3138845568 is a wasteful number, since it uses less digits than its factorization.

3138845568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1504 (or 1492 counting only the distinct ones).

The product of its digits is 2764800, while the sum is 51.

The square root of 3138845568 is about 56025.4010962885. The cubic root of 3138845568 is about 1464.1648713958.

The spelling of 3138845568 in words is "three billion, one hundred thirty-eight million, eight hundred forty-five thousand, five hundred sixty-eight".