705220 has 24 divisors (see below), whose sum is σ = 1522584. Its totient is φ = 274176.

The previous prime is 705209. The next prime is 705247. The reversal of 705220 is 22507.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 166464 + 538756 = 408^2 + 734^2 .

It is a junction number, because it is equal to n+sod(n) for n = 705194 and 705203.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 264 + ... + 1216.

It is an arithmetic number, because the mean of its divisors is an integer number (63441).

2⁷⁰⁵²²⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 705220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (761292).

705220 is an abundant number, since it is smaller than the sum of its proper divisors (817364).

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

705220 is a wasteful number, since it uses less digits than its factorization.

705220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 999 (or 997 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 16.

The square root of 705220 is about 839.7737790620. The cubic root of 705220 is about 89.0105613861.

Adding to 705220 its reverse (22507), we get a palindrome (727727).

The spelling of 705220 in words is "seven hundred five thousand, two hundred twenty".