3220752240 has 160 divisors (see below), whose sum is σ = 11117770560. Its totient is φ = 857005056.

The previous prime is 3220752193. The next prime is 3220752247. The reversal of 3220752240 is 422570223.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3220752247) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1201782 + ... + 1204458.

It is an arithmetic number, because the mean of its divisors is an integer number (69486066).

Almost surely, 2^3220752240 is an apocalyptic number.

3220752240 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 3220752240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5558885280).

3220752240 is an abundant number, since it is smaller than the sum of its proper divisors (7897018320).

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

3220752240 is a wasteful number, since it uses less digits than its factorization.

3220752240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3256 (or 3244 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 27.

The square root of 3220752240 is about 56751.6716934400. The cubic root of 3220752240 is about 1476.7912341745.

The spelling of 3220752240 in words is "three billion, two hundred twenty million, seven hundred fifty-two thousand, two hundred forty".