2800027805 has 4 divisors (see below), whose sum is σ = 3360033372. Its totient is φ = 2240022240.

The previous prime is 2800027771. The next prime is 2800027819. The reversal of 2800027805 is 5087200082.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1287517924 + 1512509881 = 35882^2 + 38891^2 .

It is not a de Polignac number, because 2800027805 - 2¹⁰ = 2800026781 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 280002776 + ... + 280002785.

It is an arithmetic number, because the mean of its divisors is an integer number (840008343).

Almost surely, 2^2800027805 is an apocalyptic number.

It is an amenable number.

2800027805 is a deficient number, since it is larger than the sum of its proper divisors (560005567).

2800027805 is an equidigital number, since it uses as much as digits as its factorization.

2800027805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 560005566.

The product of its (nonzero) digits is 8960, while the sum is 32.

The square root of 2800027805 is about 52915.2889531939. The cubic root of 2800027805 is about 1409.4644118771.

Adding to 2800027805 its reverse (5087200082), we get a palindrome (7887227887).

The spelling of 2800027805 in words is "two billion, eight hundred million, twenty-seven thousand, eight hundred five".