3220620 has 48 divisors (see below), whose sum is σ = 9713760. Its totient is φ = 792576.

The previous prime is 3220619. The next prime is 3220627. The reversal of 3220620 is 260223.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 3220620.

It is not an unprimeable number, because it can be changed into a prime (3220627) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1285 + ... + 2844.

It is an arithmetic number, because the mean of its divisors is an integer number (202370).

Almost surely, 2^3220620 is an apocalyptic number.

3220620 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3220620 is an abundant number, since it is smaller than the sum of its proper divisors (6493140).

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

3220620 is a wasteful number, since it uses less digits than its factorization.

3220620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4154 (or 4152 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 3220620 is about 1794.6085924234. The cubic root of 3220620 is about 147.6771022173.

Adding to 3220620 its reverse (260223), we get a palindrome (3480843).

The spelling of 3220620 in words is "three million, two hundred twenty thousand, six hundred twenty".