838398 has 16 divisors (see below), whose sum is σ = 1829376. Its totient is φ = 254040.

The previous prime is 838393. The next prime is 838399. The reversal of 838398 is 893838.

It is a happy number.

It is a super-2 number, since 2×838398² = 1405822412808, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 838398.

It is not an unprimeable number, because it can be changed into a prime (838391) by changing a digit.

838398 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6286 + ... + 6417.

It is an arithmetic number, because the mean of its divisors is an integer number (114336).

2⁸³⁸³⁹⁸ is an apocalyptic number.

838398 is an abundant number, since it is smaller than the sum of its proper divisors (990978).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

838398 is a wasteful number, since it uses less digits than its factorization.

838398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12719.

The product of its digits is 41472, while the sum is 39.

The square root of 838398 is about 915.6407592500. The cubic root of 838398 is about 94.2938593252.

The spelling of 838398 in words is "eight hundred thirty-eight thousand, three hundred ninety-eight".