838904 has 16 divisors (see below), whose sum is σ = 1716120. Its totient is φ = 381280.

The previous prime is 838897. The next prime is 838909. The reversal of 838904 is 409838.

It is a plaindrome in base 12.

It is a zygodrome in base 2.

It is a congruent number.

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

838904 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 (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4679 + ... + 4854.

2⁸³⁸⁹⁰⁴ is an apocalyptic number.

It is an amenable number.

838904 is an abundant number, since it is smaller than the sum of its proper divisors (877216).

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

838904 is a wasteful number, since it uses less digits than its factorization.

838904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9550 (or 9546 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 838904 is about 915.9170268097. The cubic root of 838904 is about 94.3128252966.

The spelling of 838904 in words is "eight hundred thirty-eight thousand, nine hundred four".