869838 has 8 divisors (see below), whose sum is σ = 1739688. Its totient is φ = 289944.

The previous prime is 869819. The next prime is 869849. The reversal of 869838 is 838968.

It is a sphenic number, since it is the product of 3 distinct primes.

869838 is an admirable number.

It is an Ulam number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 869838.

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 869838.

It is an unprimeable 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, 72481 + ... + 72492.

It is an arithmetic number, because the mean of its divisors is an integer number (217461).

2⁸⁶⁹⁸³⁸ is an apocalyptic number.

869838 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

869838 is a wasteful number, since it uses less digits than its factorization.

869838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144978.

The product of its digits is 82944, while the sum is 42.

The square root of 869838 is about 932.6510601506. The cubic root of 869838 is about 95.4581013724.

The spelling of 869838 in words is "eight hundred sixty-nine thousand, eight hundred thirty-eight".