3220812140 has 108 divisors (see below), whose sum is σ = 8520207696. Its totient is φ = 1019281536.

The previous prime is 3220812137. The next prime is 3220812167. The reversal of 3220812140 is 412180223.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 155897 + ... + 175343.

It is an arithmetic number, because the mean of its divisors is an integer number (78890812).

Almost surely, 2^3220812140 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 3220812140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4260103848).

3220812140 is an abundant number, since it is smaller than the sum of its proper divisors (5299395556).

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

3220812140 is a wasteful number, since it uses less digits than its factorization.

3220812140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19496 (or 19474 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 3220812140 is about 56752.1994287446. The cubic root of 3220812140 is about 1476.8003893076.

Adding to 3220812140 its reverse (412180223), we get a palindrome (3632992363).

The spelling of 3220812140 in words is "three billion, two hundred twenty million, eight hundred twelve thousand, one hundred forty".