2730728 has 96 divisors (see below), whose sum is σ = 7150080. Its totient is φ = 950400.

The previous prime is 2730713. The next prime is 2730743. The reversal of 2730728 is 8270372.

2730728 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2730713) and next prime (2730743).

It is a self number, because there is not a number n which added to its sum of digits gives 2730728.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 88073 + ... + 88103.

It is an arithmetic number, because the mean of its divisors is an integer number (74480).

2^2730728 is an apocalyptic number.

2730728 is a gapful number since it is divisible by the number (28) 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 2730728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3575040).

2730728 is an abundant number, since it is smaller than the sum of its proper divisors (4419352).

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

2730728 is a wasteful number, since it uses less digits than its factorization.

2730728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79 (or 64 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 29.

The square root of 2730728 is about 1652.4914523228. The cubic root of 2730728 is about 139.7739208266.

The spelling of 2730728 in words is "two million, seven hundred thirty thousand, seven hundred twenty-eight".