3321220 has 36 divisors (see below), whose sum is σ = 8115660. Its totient is φ = 1138368.

The previous prime is 3321217. The next prime is 3321229. The reversal of 3321220 is 221233.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2414916 + 906304 = 1554^2 + 952^2 .

It is a super-2 number, since 2×3321220² = 22061004576800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 3321220.

It is not an unprimeable number, because it can be changed into a prime (3321229) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 715 + ... + 2674.

It is an arithmetic number, because the mean of its divisors is an integer number (225435).

Almost surely, 2^3321220 is an apocalyptic number.

It is an amenable number.

3321220 is an abundant number, since it is smaller than the sum of its proper divisors (4794440).

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

3321220 is a wasteful number, since it uses less digits than its factorization.

3321220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3412 (or 3403 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 3321220 is about 1822.4214660720. The cubic root of 3321220 is about 149.1989894202.

Adding to 3321220 its sum of digits (13), we get a palindrome (3321233).

Adding to 3321220 its reverse (221233), we get a palindrome (3542453).

The spelling of 3321220 in words is "three million, three hundred twenty-one thousand, two hundred twenty".