2808533 has 12 divisors (see below), whose sum is σ = 3519180. Its totient is φ = 2221632.

The previous prime is 2808527. The next prime is 2808551. The reversal of 2808533 is 3358082.

It can be written as a sum of positive squares in 2 ways, for example, as 305809 + 2502724 = 553^2 + 1582^2 .

It is not a de Polignac number, because 2808533 - 2⁴ = 2808517 is a prime.

It is a super-2 number, since 2×2808533² = 15775715224178, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2808496 and 2808505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2808583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1568 + ... + 2841.

It is an arithmetic number, because the mean of its divisors is an integer number (293265).

2^2808533 is an apocalyptic number.

It is an amenable number.

2808533 is a deficient number, since it is larger than the sum of its proper divisors (710647).

2808533 is a wasteful number, since it uses less digits than its factorization.

2808533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4436 (or 4429 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 2808533 is about 1675.8678348844. The cubic root of 2808533 is about 141.0890070617.

The spelling of 2808533 in words is "two million, eight hundred eight thousand, five hundred thirty-three".