3845998897128 has 96 divisors (see below), whose sum is σ = 10621494243360. Its totient is φ = 1256875367040.

The previous prime is 3845998897123. The next prime is 3845998897151. The reversal of 3845998897128 is 8217988995483.

3845998897128 is a `hidden beast` number, since 3 + 8 + 4 + 599 + 8 + 8 + 9 + 7 + 12 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (3845998897123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 77850 + ... + 2774537.

It is an arithmetic number, because the mean of its divisors is an integer number (110640565035).

Almost surely, 2^{3845998897128} 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 3845998897128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5310747121680).

3845998897128 is an abundant number, since it is smaller than the sum of its proper divisors (6775495346232).

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

3845998897128 is a wasteful number, since it uses less digits than its factorization.

3845998897128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2852767 (or 2852760 counting only the distinct ones).

The product of its digits is 2508226560, while the sum is 81.

The spelling of 3845998897128 in words is "three trillion, eight hundred forty-five billion, nine hundred ninety-eight million, eight hundred ninety-seven thousand, one hundred twenty-eight".