2728836 has 48 divisors (see below), whose sum is σ = 7721280. Its totient is φ = 826560.

The previous prime is 2728819. The next prime is 2728841. The reversal of 2728836 is 6388272.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a d-powerful number, because it can be written as 2⁴ + 7² + 2²⁰ + 8² + 8³ + 3 + 6⁸ .

It is a self number, because there is not a number n which added to its sum of digits gives 2728836.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40 + ... + 2336.

It is an arithmetic number, because the mean of its divisors is an integer number (160860).

2^2728836 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 2728836, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3860640).

2728836 is an abundant number, since it is smaller than the sum of its proper divisors (4992444).

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

2728836 is a wasteful number, since it uses less digits than its factorization.

2728836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2321 (or 2313 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The square root of 2728836 is about 1651.9188842071. The cubic root of 2728836 is about 139.7416323236.

The spelling of 2728836 in words is "two million, seven hundred twenty-eight thousand, eight hundred thirty-six".