890445 has 32 divisors (see below), whose sum is σ = 1555200. Its totient is φ = 433664.

The previous prime is 890441. The next prime is 890459. The reversal of 890445 is 544098.

890445 is a nontrivial binomial coefficient, being equal to C(1335, 2).

It is a cyclic number.

It is not a de Polignac number, because 890445 - 2² = 890441 is a prime.

890445 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (890441) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 9961 + ... + 10049.

It is an arithmetic number, because the mean of its divisors is an integer number (48600).

2⁸⁹⁰⁴⁴⁵ is an apocalyptic number.

890445 is the 1334-th triangular number.

It is an amenable number.

890445 is a deficient number, since it is larger than the sum of its proper divisors (664755).

890445 is a wasteful number, since it uses less digits than its factorization.

890445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149.

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 890445 is about 943.6339332601. The cubic root of 890445 is about 96.2060461591.

The spelling of 890445 in words is "eight hundred ninety thousand, four hundred forty-five".