3613220 has 36 divisors (see below), whose sum is σ = 8224020. Its totient is φ = 1332864.

The previous prime is 3613217. The next prime is 3613237. The reversal of 3613220 is 223163.

It can be written as a sum of positive squares in 6 ways, for example, as 763876 + 2849344 = 874^2 + 1688^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2846 + ... + 3914.

It is an arithmetic number, because the mean of its divisors is an integer number (228445).

Almost surely, 2^3613220 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 3613220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4112010).

3613220 is an abundant number, since it is smaller than the sum of its proper divisors (4610800).

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

3613220 is a wasteful number, since it uses less digits than its factorization.

3613220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1104 (or 1089 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 3613220 is about 1900.8471795492. The cubic root of 3613220 is about 153.4492612068.

Adding to 3613220 its reverse (223163), we get a palindrome (3836383).

The spelling of 3613220 in words is "three million, six hundred thirteen thousand, two hundred twenty".