2800845 has 16 divisors (see below), whose sum is σ = 4979520. Its totient is φ = 1493712.

The previous prime is 2800843. The next prime is 2800859. The reversal of 2800845 is 5480082.

It is not a de Polignac number, because 2800845 - 2¹ = 2800843 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

2800845 is a lucky number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2800843) 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 15 ways as a sum of consecutive naturals, for example, 10239 + ... + 10508.

It is an arithmetic number, because the mean of its divisors is an integer number (311220).

2^2800845 is an apocalyptic number.

It is an amenable number.

2800845 is a deficient number, since it is larger than the sum of its proper divisors (2178675).

2800845 is a wasteful number, since it uses less digits than its factorization.

2800845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20761 (or 20755 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 27.

The square root of 2800845 is about 1673.5725260651. The cubic root of 2800845 is about 140.9601517091.

The spelling of 2800845 in words is "two million, eight hundred thousand, eight hundred forty-five".