890635 has 4 divisors (see below), whose sum is σ = 1068768. Its totient is φ = 712504.

The previous prime is 890609. The next prime is 890653. The reversal of 890635 is 536098.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 536098 = 2 ⋅268049.

It is a cyclic number.

It is not a de Polignac number, because 890635 - 2¹⁵ = 857867 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

890635 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 890597 and 890606.

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 in 3 ways as a sum of consecutive naturals, for example, 89059 + ... + 89068.

It is an arithmetic number, because the mean of its divisors is an integer number (267192).

2⁸⁹⁰⁶³⁵ is an apocalyptic number.

890635 is a deficient number, since it is larger than the sum of its proper divisors (178133).

890635 is a wasteful number, since it uses less digits than its factorization.

890635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178132.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 890635 is about 943.7346025234. The cubic root of 890635 is about 96.2128883742.

The spelling of 890635 in words is "eight hundred ninety thousand, six hundred thirty-five".