838821135 has 16 divisors (see below), whose sum is σ = 1342625760. Its totient is φ = 447200640.

The previous prime is 838821133. The next prime is 838821209. The reversal of 838821135 is 531128838.

It is not a de Polignac number, because 838821135 - 2¹ = 838821133 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 838821093 and 838821102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (838821133) 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 15 ways as a sum of consecutive naturals, for example, 36781 + ... + 55049.

It is an arithmetic number, because the mean of its divisors is an integer number (83914110).

Almost surely, 2^838821135 is an apocalyptic number.

838821135 is a deficient number, since it is larger than the sum of its proper divisors (503804625).

838821135 is a wasteful number, since it uses less digits than its factorization.

838821135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21338.

The product of its digits is 46080, while the sum is 39.

The square root of 838821135 is about 28962.4089985623. The cubic root of 838821135 is about 943.0971985994.

The spelling of 838821135 in words is "eight hundred thirty-eight million, eight hundred twenty-one thousand, one hundred thirty-five".