2797805 has 4 divisors (see below), whose sum is σ = 3357372. Its totient is φ = 2238240.

The previous prime is 2797793. The next prime is 2797813. The reversal of 2797805 is 5087972.

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 669124 + 2128681 = 818^2 + 1459^2 .

It is not a de Polignac number, because 2797805 - 2⁸ = 2797549 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, 279776 + ... + 279785.

It is an arithmetic number, because the mean of its divisors is an integer number (839343).

2^2797805 is an apocalyptic number.

It is an amenable number.

2797805 is a deficient number, since it is larger than the sum of its proper divisors (559567).

2797805 is an equidigital number, since it uses as much as digits as its factorization.

2797805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 559566.

The product of its (nonzero) digits is 35280, while the sum is 38.

The square root of 2797805 is about 1672.6640427773. The cubic root of 2797805 is about 140.9091344874.

The spelling of 2797805 in words is "two million, seven hundred ninety-seven thousand, eight hundred five".