3218388 has 12 divisors (see below), whose sum is σ = 7509600. Its totient is φ = 1072792.

The previous prime is 3218357. The next prime is 3218399. The reversal of 3218388 is 8838123.

3218388 is digitally balanced in base 2 and base 5, because in such bases it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134088 + ... + 134111.

It is an arithmetic number, because the mean of its divisors is an integer number (625800).

Almost surely, 2^3218388 is an apocalyptic number.

It is an amenable number.

3218388 is an abundant number, since it is smaller than the sum of its proper divisors (4291212).

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

3218388 is a wasteful number, since it uses less digits than its factorization.

3218388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268206 (or 268204 counting only the distinct ones).

The product of its digits is 9216, while the sum is 33.

The square root of 3218388 is about 1793.9866220237. The cubic root of 3218388 is about 147.6429792362.

The spelling of 3218388 in words is "three million, two hundred eighteen thousand, three hundred eighty-eight".