855838 has 4 divisors (see below), whose sum is σ = 1283760. Its totient is φ = 427918.

The previous prime is 855821. The next prime is 855851. The reversal of 855838 is 838558.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 855797 and 855806.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 213958 + ... + 213961.

It is an arithmetic number, because the mean of its divisors is an integer number (320940).

2⁸⁵⁵⁸³⁸ is an apocalyptic number.

855838 is a deficient number, since it is larger than the sum of its proper divisors (427922).

855838 is a wasteful number, since it uses less digits than its factorization.

855838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427921.

The product of its digits is 38400, while the sum is 37.

The square root of 855838 is about 925.1151279706. The cubic root of 855838 is about 94.9431978073.

The spelling of 855838 in words is "eight hundred fifty-five thousand, eight hundred thirty-eight".