2938821893 has 12 divisors (see below), whose sum is σ = 3425220972. Its totient is φ = 2514133440.

The previous prime is 2938821889. The next prime is 2938821911. The reversal of 2938821893 is 3981288392.

It can be written as a sum of positive squares in 2 ways, for example, as 2151289924 + 787531969 = 46382^2 + 28063^2 .

It is not a de Polignac number, because 2938821893 - 2² = 2938821889 is a prime.

It is a super-2 number, since 2×2938821893² = 17273348237552206898, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2938821833) 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 11 ways as a sum of consecutive naturals, for example, 32030 + ... + 83087.

It is an arithmetic number, because the mean of its divisors is an integer number (285435081).

Almost surely, 2^2938821893 is an apocalyptic number.

It is an amenable number.

2938821893 is a deficient number, since it is larger than the sum of its proper divisors (486399079).

2938821893 is a wasteful number, since it uses less digits than its factorization.

2938821893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115652 (or 115645 counting only the distinct ones).

The product of its digits is 1492992, while the sum is 53.

The square root of 2938821893 is about 54210.9019755252. The cubic root of 2938821893 is about 1432.3783742412.

The spelling of 2938821893 in words is "two billion, nine hundred thirty-eight million, eight hundred twenty-one thousand, eight hundred ninety-three".