3220388 has 6 divisors (see below), whose sum is σ = 5635686. Its totient is φ = 1610192.

The previous prime is 3220381. The next prime is 3220409. The reversal of 3220388 is 8830223.

It can be written as a sum of positive squares in only one way, i.e., 2930944 + 289444 = 1712^2 + 538^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (3220381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 402545 + ... + 402552.

It is an arithmetic number, because the mean of its divisors is an integer number (939281).

Almost surely, 2^3220388 is an apocalyptic number.

It is an amenable number.

3220388 is a deficient number, since it is larger than the sum of its proper divisors (2415298).

3220388 is a wasteful number, since it uses less digits than its factorization.

3220388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 805101 (or 805099 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 3220388 is about 1794.5439532093. The cubic root of 3220388 is about 147.6735561185.

The spelling of 3220388 in words is "three million, two hundred twenty thousand, three hundred eighty-eight".