850905 has 40 divisors (see below), whose sum is σ = 1672704. Its totient is φ = 410400.

The previous prime is 850897. The next prime is 850933. The reversal of 850905 is 509058.

It is not a de Polignac number, because 850905 - 2³ = 850897 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an alternating number because its digits alternate between even and odd.

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 850905.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 4360 + ... + 4550.

2⁸⁵⁰⁹⁰⁵ is an apocalyptic number.

It is an amenable number.

850905 is a deficient number, since it is larger than the sum of its proper divisors (821799).

850905 is a wasteful number, since it uses less digits than its factorization.

850905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219 (or 210 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

The square root of 850905 is about 922.4451203188. The cubic root of 850905 is about 94.7604305298.

The spelling of 850905 in words is "eight hundred fifty thousand, nine hundred five".