3218320 has 60 divisors (see below), whose sum is σ = 8714844. Its totient is φ = 1102080.

The previous prime is 3218317. The next prime is 3218323. The reversal of 3218320 is 238123.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (3218317) and next prime (3218323).

It can be written as a sum of positive squares in 2 ways, for example, as 1016064 + 2202256 = 1008^2 + 1484^2 .

It is not an unprimeable number, because it can be changed into a prime (3218323) 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, 3510 + ... + 4330.

Almost surely, 2^3218320 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3218320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4357422).

3218320 is an abundant number, since it is smaller than the sum of its proper divisors (5496524).

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

3218320 is a wasteful number, since it uses less digits than its factorization.

3218320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 848 (or 835 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 3218320 is about 1793.9676697198. The cubic root of 3218320 is about 147.6419393996.

The spelling of 3218320 in words is "three million, two hundred eighteen thousand, three hundred twenty".