3180385728 has 224 divisors, whose sum is σ = 10396037120. Its totient is φ = 946805760.

The previous prime is 3180385711. The next prime is 3180385729. The reversal of 3180385728 is 8275830813.

It is a super-2 number, since 2×3180385728² = 20229706757732179968, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3180385729) 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, 694101 + ... + 698667.

It is an arithmetic number, because the mean of its divisors is an integer number (46410880).

Almost surely, 2^3180385728 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 3180385728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5198018560).

3180385728 is an abundant number, since it is smaller than the sum of its proper divisors (7215651392).

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

3180385728 is a wasteful number, since it uses less digits than its factorization.

3180385728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4632 (or 4616 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 45.

The square root of 3180385728 is about 56394.9087063717. The cubic root of 3180385728 is about 1470.5956103682.

The spelling of 3180385728 in words is "three billion, one hundred eighty million, three hundred eighty-five thousand, seven hundred twenty-eight".