2808013 has 8 divisors (see below), whose sum is σ = 3074456. Its totient is φ = 2548800.

The previous prime is 2808007. The next prime is 2808017. The reversal of 2808013 is 3108082.

It can be written as a sum of positive squares in 4 ways, for example, as 59049 + 2748964 = 243^2 + 1658^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2808013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2808017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 978 + ... + 2563.

It is an arithmetic number, because the mean of its divisors is an integer number (384307).

2^2808013 is an apocalyptic number.

It is an amenable number.

2808013 is a deficient number, since it is larger than the sum of its proper divisors (266443).

2808013 is a wasteful number, since it uses less digits than its factorization.

2808013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3615.

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 2808013 is about 1675.7126842034. The cubic root of 2808013 is about 141.0802989791.

The spelling of 2808013 in words is "two million, eight hundred eight thousand, thirteen".