858039 has 24 divisors (see below), whose sum is σ = 1436400. Its totient is φ = 451584.

The previous prime is 858029. The next prime is 858043. The reversal of 858039 is 930858.

It is a de Polignac number, because none of the positive numbers 2^k-858039 is a prime.

858039 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (858029) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 1687 + ... + 2135.

It is an arithmetic number, because the mean of its divisors is an integer number (59850).

2⁸⁵⁸⁰³⁹ is an apocalyptic number.

858039 is a deficient number, since it is larger than the sum of its proper divisors (578361).

858039 is a wasteful number, since it uses less digits than its factorization.

858039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 479 (or 472 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 858039 is about 926.3039457975. The cubic root of 858039 is about 95.0245181407.

The spelling of 858039 in words is "eight hundred fifty-eight thousand, thirty-nine".