890845 has 4 divisors (see below), whose sum is σ = 1069020. Its totient is φ = 712672.

The previous prime is 890843. The next prime is 890861. The reversal of 890845 is 548098.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 268324 + 622521 = 518^2 + 789^2 .

It is a cyclic number.

It is not a de Polignac number, because 890845 - 2¹ = 890843 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 890845.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (890843) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89080 + ... + 89089.

It is an arithmetic number, because the mean of its divisors is an integer number (267255).

2⁸⁹⁰⁸⁴⁵ is an apocalyptic number.

It is an amenable number.

890845 is a deficient number, since it is larger than the sum of its proper divisors (178175).

890845 is a wasteful number, since it uses less digits than its factorization.

890845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178174.

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 890845 is about 943.8458560591. The cubic root of 890845 is about 96.2204496905.

The spelling of 890845 in words is "eight hundred ninety thousand, eight hundred forty-five".