420844 has 6 divisors (see below), whose sum is σ = 736484. Its totient is φ = 210420.

The previous prime is 420811. The next prime is 420851. The reversal of 420844 is 448024.

It is an unprimeable number.

420844 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52602 + ... + 52609.

2⁴²⁰⁸⁴⁴ is an apocalyptic number.

It is an amenable number.

420844 is a deficient number, since it is larger than the sum of its proper divisors (315640).

420844 is a wasteful number, since it uses less digits than its factorization.

420844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105215 (or 105213 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 22.

The square root of 420844 is about 648.7249031755. The cubic root of 420844 is about 74.9388538659.

Adding to 420844 its reverse (448024), we get a palindrome (868868).

The spelling of 420844 in words is "four hundred twenty thousand, eight hundred forty-four".