2939865444 has 72 divisors (see below), whose sum is σ = 7531786080. Its totient is φ = 966759552.

The previous prime is 2939865443. The next prime is 2939865457. The reversal of 2939865444 is 4445689392.

2939865444 is a `hidden beast` number, since 2 + 9 + 3 + 98 + 6 + 544 + 4 = 666.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (2939865443) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 2059459 + ... + 2060885.

It is an arithmetic number, because the mean of its divisors is an integer number (104608140).

Almost surely, 2^2939865444 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 2939865444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3765893040).

2939865444 is an abundant number, since it is smaller than the sum of its proper divisors (4591920636).

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

2939865444 is a wasteful number, since it uses less digits than its factorization.

2939865444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2169 (or 2164 counting only the distinct ones).

The product of its digits is 7464960, while the sum is 54.

The square root of 2939865444 is about 54220.5260394991. The cubic root of 2939865444 is about 1432.5478960256.

The spelling of 2939865444 in words is "two billion, nine hundred thirty-nine million, eight hundred sixty-five thousand, four hundred forty-four".