890605 has 8 divisors (see below), whose sum is σ = 1087200. Its totient is φ = 700176.

The previous prime is 890597. The next prime is 890609. The reversal of 890605 is 506098.

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

It is a cyclic number.

It is not a de Polignac number, because 890605 - 2³ = 890597 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (890609) 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 7 ways as a sum of consecutive naturals, for example, 1215 + ... + 1804.

It is an arithmetic number, because the mean of its divisors is an integer number (135900).

2⁸⁹⁰⁶⁰⁵ is an apocalyptic number.

It is an amenable number.

890605 is a deficient number, since it is larger than the sum of its proper divisors (196595).

890605 is a wasteful number, since it uses less digits than its factorization.

890605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3083.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 890605 is about 943.7187080905. The cubic root of 890605 is about 96.2118080892.

The spelling of 890605 in words is "eight hundred ninety thousand, six hundred five".