890685 has 12 divisors (see below), whose sum is σ = 1543932. Its totient is φ = 475008.

The previous prime is 890683. The next prime is 890707. The reversal of 890685 is 586098.

It can be written as a sum of positive squares in 2 ways, for example, as 527076 + 363609 = 726^2 + 603^2 .

It is not a de Polignac number, because 890685 - 2¹ = 890683 is a prime.

890685 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (890683) 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 11 ways as a sum of consecutive naturals, for example, 9852 + ... + 9941.

It is an arithmetic number, because the mean of its divisors is an integer number (128661).

2⁸⁹⁰⁶⁸⁵ is an apocalyptic number.

It is an amenable number.

890685 is a deficient number, since it is larger than the sum of its proper divisors (653247).

890685 is a wasteful number, since it uses less digits than its factorization.

890685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19804 (or 19801 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 890685 is about 943.7610926500. The cubic root of 890685 is about 96.2146887954.

The spelling of 890685 in words is "eight hundred ninety thousand, six hundred eighty-five".