2228705 has 4 divisors (see below), whose sum is σ = 2674452. Its totient is φ = 1782960.

The previous prime is 2228687. The next prime is 2228711. The reversal of 2228705 is 5078222.

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 1079521 + 1149184 = 1039^2 + 1072^2 .

It is not a de Polignac number, because 2228705 - 2⁸ = 2228449 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 222866 + ... + 222875.

It is an arithmetic number, because the mean of its divisors is an integer number (668613).

2^2228705 is an apocalyptic number.

It is an amenable number.

2228705 is a deficient number, since it is larger than the sum of its proper divisors (445747).

2228705 is an equidigital number, since it uses as much as digits as its factorization.

2228705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 445746.

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 2228705 is about 1492.8847912682. The cubic root of 2228705 is about 130.6223609274.

The spelling of 2228705 in words is "two million, two hundred twenty-eight thousand, seven hundred five".