838044891 has 12 divisors (see below), whose sum is σ = 1227092568. Its totient is φ = 551042784.

The previous prime is 838044853. The next prime is 838044899. The reversal of 838044891 is 198440838.

It is not a de Polignac number, because 838044891 - 2⁷ = 838044763 is a prime.

It is a Smith number, since the sum of its digits (45) 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 (838044899) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 637125 + ... + 638438.

It is an arithmetic number, because the mean of its divisors is an integer number (102257714).

Almost surely, 2^838044891 is an apocalyptic number.

838044891 is a deficient number, since it is larger than the sum of its proper divisors (389047677).

838044891 is a wasteful number, since it uses less digits than its factorization.

838044891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1275642 (or 1275639 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 45.

The square root of 838044891 is about 28949.0050088082. The cubic root of 838044891 is about 942.8061951711.

The spelling of 838044891 in words is "eight hundred thirty-eight million, forty-four thousand, eight hundred ninety-one".