838989 has 12 divisors (see below), whose sum is σ = 1229436. Its totient is φ = 551232.

The previous prime is 838969. The next prime is 838991. The reversal of 838989 is 989838.

It can be written as a sum of positive squares in 2 ways, for example, as 514089 + 324900 = 717^2 + 570^2 .

It is not a de Polignac number, because 838989 - 2¹² = 834893 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (838909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19 + ... + 1295.

It is an arithmetic number, because the mean of its divisors is an integer number (102453).

2⁸³⁸⁹⁸⁹ is an apocalyptic number.

It is an amenable number.

838989 is a deficient number, since it is larger than the sum of its proper divisors (390447).

838989 is a wasteful number, since it uses less digits than its factorization.

838989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1356 (or 1353 counting only the distinct ones).

The product of its digits is 124416, while the sum is 45.

The square root of 838989 is about 915.9634272175. The cubic root of 838989 is about 94.3160105317.

The spelling of 838989 in words is "eight hundred thirty-eight thousand, nine hundred eighty-nine".