820450 has 24 divisors (see below), whose sum is σ = 1556820. Its totient is φ = 321600.

The previous prime is 820441. The next prime is 820459. The reversal of 820450 is 54028.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (820441) and next prime (820459).

It can be written as a sum of positive squares in 6 ways, for example, as 5041 + 815409 = 71^2 + 903^2 .

It is not an unprimeable number, because it can be changed into a prime (820459) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2916 + ... + 3184.

2⁸²⁰⁴⁵⁰ is an apocalyptic number.

820450 is a deficient number, since it is larger than the sum of its proper divisors (736370).

820450 is a wasteful number, since it uses less digits than its factorization.

820450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342 (or 337 counting only the distinct ones).

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

The square root of 820450 is about 905.7869506678. The cubic root of 820450 is about 93.6161348716.

Adding to 820450 its reverse (54028), we get a palindrome (874478).

The spelling of 820450 in words is "eight hundred twenty thousand, four hundred fifty".