3213244240 has 80 divisors (see below), whose sum is σ = 7784501760. Its totient is φ = 1232110080.

The previous prime is 3213244207. The next prime is 3213244249. The reversal of 3213244240 is 424423123.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3213244249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 259306 + ... + 271414.

It is an arithmetic number, because the mean of its divisors is an integer number (97306272).

Almost surely, 2^3213244240 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 3213244240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3892250880).

3213244240 is an abundant number, since it is smaller than the sum of its proper divisors (4571257520).

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

3213244240 is a wasteful number, since it uses less digits than its factorization.

3213244240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12260 (or 12254 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 25.

The square root of 3213244240 is about 56685.4852673945. The cubic root of 3213244240 is about 1475.6428093547.

Adding to 3213244240 its reverse (424423123), we get a palindrome (3637667363).

The spelling of 3213244240 in words is "three billion, two hundred thirteen million, two hundred forty-four thousand, two hundred forty".