450820 has 12 divisors (see below), whose sum is σ = 946764. Its totient is φ = 180320.

The previous prime is 450817. The next prime is 450829. The reversal of 450820 is 28054.

It is a happy number.

450820 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 264196 + 186624 = 514^2 + 432^2 .

It is not an unprimeable number, because it can be changed into a prime (450829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11251 + ... + 11290.

It is an arithmetic number, because the mean of its divisors is an integer number (78897).

2⁴⁵⁰⁸²⁰ is an apocalyptic number.

It is an amenable number.

450820 is an abundant number, since it is smaller than the sum of its proper divisors (495944).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

450820 is a wasteful number, since it uses less digits than its factorization.

450820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22550 (or 22548 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 450820 is about 671.4313069853. The cubic root of 450820 is about 76.6774611980.

Adding to 450820 its reverse (28054), we get a palindrome (478874).

The spelling of 450820 in words is "four hundred fifty thousand, eight hundred twenty".