2838728 has 16 divisors (see below), whose sum is σ = 5635980. Its totient is φ = 1335808.

The previous prime is 2838727. The next prime is 2838743. The reversal of 2838728 is 8278382.

It can be written as a sum of positive squares in 2 ways, for example, as 2829124 + 9604 = 1682^2 + 98^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2838691 and 2838700.

It is not an unprimeable number, because it can be changed into a prime (2838721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10301 + ... + 10572.

2^2838728 is an apocalyptic number.

It is an amenable number.

2838728 is a deficient number, since it is larger than the sum of its proper divisors (2797252).

2838728 is a wasteful number, since it uses less digits than its factorization.

2838728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20896 (or 20892 counting only the distinct ones).

The product of its digits is 43008, while the sum is 38.

The square root of 2838728 is about 1684.8525158007. The cubic root of 2838728 is about 141.5928294963.

The spelling of 2838728 in words is "two million, eight hundred thirty-eight thousand, seven hundred twenty-eight".