3216240 has 80 divisors (see below), whose sum is σ = 11085600. Its totient is φ = 857088.

The previous prime is 3216233. The next prime is 3216259. The reversal of 3216240 is 426123.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1416 + ... + 2904.

It is an arithmetic number, because the mean of its divisors is an integer number (138570).

Almost surely, 2^3216240 is an apocalyptic number.

3216240 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3216240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5542800).

3216240 is an abundant number, since it is smaller than the sum of its proper divisors (7869360).

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

3216240 is a wasteful number, since it uses less digits than its factorization.

3216240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1511 (or 1499 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 3216240 is about 1793.3878554289. The cubic root of 3216240 is about 147.6101255530.

It can be divided in two parts, 321 and 6240, that added together give a 8-th power (6561 = 3⁸).

The spelling of 3216240 in words is "three million, two hundred sixteen thousand, two hundred forty".