3838821305 has 8 divisors (see below), whose sum is σ = 5025366144. Its totient is φ = 2791870000.

The previous prime is 3838821293. The next prime is 3838821341. The reversal of 3838821305 is 5031288383.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3838821305 - 2¹⁰ = 3838820281 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 34898321 + ... + 34898430.

It is an arithmetic number, because the mean of its divisors is an integer number (628170768).

Almost surely, 2^3838821305 is an apocalyptic number.

It is an amenable number.

3838821305 is a deficient number, since it is larger than the sum of its proper divisors (1186544839).

3838821305 is a wasteful number, since it uses less digits than its factorization.

3838821305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69796767.

The product of its (nonzero) digits is 138240, while the sum is 41.

The square root of 3838821305 is about 61958.2222550002. Note that the first 4 decimals coincide. The cubic root of 3838821305 is about 1565.7868166366.

The spelling of 3838821305 in words is "three billion, eight hundred thirty-eight million, eight hundred twenty-one thousand, three hundred five".