2861989038 has 80 divisors (see below), whose sum is σ = 7044174720. Its totient is φ = 864469584.

The previous prime is 2861989021. The next prime is 2861989043. The reversal of 2861989038 is 8309891682.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 50581 + ... + 91007.

It is an arithmetic number, because the mean of its divisors is an integer number (88052184).

Almost surely, 2^2861989038 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2861989038, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3522087360).

2861989038 is an abundant number, since it is smaller than the sum of its proper divisors (4182185682).

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

2861989038 is a wasteful number, since it uses less digits than its factorization.

2861989038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40483 (or 40474 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 54.

The square root of 2861989038 is about 53497.5610472104. The cubic root of 2861989038 is about 1419.7852346626.

The spelling of 2861989038 in words is "two billion, eight hundred sixty-one million, nine hundred eighty-nine thousand, thirty-eight".