673220 has 24 divisors (see below), whose sum is σ = 1450008. Its totient is φ = 262400.

The previous prime is 673207. The next prime is 673223. The reversal of 673220 is 22376.

It can be written as a sum of positive squares in 4 ways, for example, as 4096 + 669124 = 64^2 + 818^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 673192 and 673201.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 673220.

It is not an unprimeable number, because it can be changed into a prime (673223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 410 + ... + 1230.

It is an arithmetic number, because the mean of its divisors is an integer number (60417).

2⁶⁷³²²⁰ is an apocalyptic number.

It is a pronic number, being equal to 820×821.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 673220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (725004).

673220 is an abundant number, since it is smaller than the sum of its proper divisors (776788).

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

673220 is a wasteful number, since it uses less digits than its factorization.

673220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 871 (or 869 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 20.

The square root of 673220 is about 820.4998476539. The cubic root of 673220 is about 87.6433568378.

Adding to 673220 its reverse (22376), we get a palindrome (695596).

The spelling of 673220 in words is "six hundred seventy-three thousand, two hundred twenty".