3555220 has 12 divisors (see below), whose sum is σ = 7466004. Its totient is φ = 1422080.

The previous prime is 3555217. The next prime is 3555229. The reversal of 3555220 is 225553.

3555220 is digitally balanced in base 5, 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 685584 + 2869636 = 828^2 + 1694^2 .

It is a junction number, because it is equal to n+sod(n) for n = 3555191 and 3555200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3555229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88861 + ... + 88900.

It is an arithmetic number, because the mean of its divisors is an integer number (622167).

Almost surely, 2^3555220 is an apocalyptic number.

It is an amenable number.

3555220 is an abundant number, since it is smaller than the sum of its proper divisors (3910784).

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

3555220 is a wasteful number, since it uses less digits than its factorization.

3555220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177770 (or 177768 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 22.

The square root of 3555220 is about 1885.5291034614. The cubic root of 3555220 is about 152.6237640824.

It can be divided in two parts, 35 and 55220, that added together give a palindrome (55255).

The spelling of 3555220 in words is "three million, five hundred fifty-five thousand, two hundred twenty".