613220 has 12 divisors (see below), whose sum is σ = 1287804. Its totient is φ = 245280.

The previous prime is 613219. The next prime is 613229. The reversal of 613220 is 22316.

613220 is digitally balanced in base 2, 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 473344 + 139876 = 688^2 + 374^2 .

It is a zygodrome in base 8.

It is a junction number, because it is equal to n+sod(n) for n = 613195 and 613204.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 613220.

It is not an unprimeable number, because it can be changed into a prime (613229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15311 + ... + 15350.

It is an arithmetic number, because the mean of its divisors is an integer number (107317).

2⁶¹³²²⁰ is an apocalyptic number.

It is an amenable number.

613220 is an abundant number, since it is smaller than the sum of its proper divisors (674584).

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

613220 is a wasteful number, since it uses less digits than its factorization.

613220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30670 (or 30668 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 613220 is about 783.0836481501. The cubic root of 613220 is about 84.9582263016.

Adding to 613220 its reverse (22316), we get a palindrome (635536).

The spelling of 613220 in words is "six hundred thirteen thousand, two hundred twenty".