3182729728 has 40 divisors (see below), whose sum is σ = 6409446912. Its totient is φ = 1578802176.

The previous prime is 3182729699. The next prime is 3182729747. The reversal of 3182729728 is 8279272813.

It is a happy number.

It is a super-3 number, since 3×3182729728³ (a number of 29 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40551 + ... + 89497.

Almost surely, 2^3182729728 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 3182729728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3204723456).

3182729728 is an abundant number, since it is smaller than the sum of its proper divisors (3226717184).

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

3182729728 is an equidigital number, since it uses as much as digits as its factorization.

3182729728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49092 (or 49076 counting only the distinct ones).

The product of its digits is 677376, while the sum is 49.

The square root of 3182729728 is about 56415.6868964652. The cubic root of 3182729728 is about 1470.9568065563.

The spelling of 3182729728 in words is "three billion, one hundred eighty-two million, seven hundred twenty-nine thousand, seven hundred twenty-eight".