2881842138 has 160 divisors (see below), whose sum is σ = 7903526400. Its totient is φ = 766488096.

The previous prime is 2881842133. The next prime is 2881842179. The reversal of 2881842138 is 8312481882.

It is a happy number.

It is a super-2 number, since 2×2881842138² = 16610028216704822088, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2881842093 and 2881842102.

It is not an unprimeable number, because it can be changed into a prime (2881842133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1270081 + ... + 1272347.

It is an arithmetic number, because the mean of its divisors is an integer number (49397040).

Almost surely, 2^2881842138 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2881842138, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3951763200).

2881842138 is an abundant number, since it is smaller than the sum of its proper divisors (5021684262).

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

2881842138 is a wasteful number, since it uses less digits than its factorization.

2881842138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2366 (or 2357 counting only the distinct ones).

The product of its digits is 196608, while the sum is 45.

The square root of 2881842138 is about 53682.7918238238. The cubic root of 2881842138 is about 1423.0606038237.

The spelling of 2881842138 in words is "two billion, eight hundred eighty-one million, eight hundred forty-two thousand, one hundred thirty-eight".