2240785 has 4 divisors (see below), whose sum is σ = 2688948. Its totient is φ = 1792624.

The previous prime is 2240779. The next prime is 2240789. The reversal of 2240785 is 5870422.

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 1478656 + 762129 = 1216^2 + 873^2 .

It is a cyclic number.

It is not a de Polignac number, because 2240785 - 2⁷ = 2240657 is a prime.

It is a super-2 number, since 2×2240785² = 10042234832450, which contains 22 as substring.

It is a Duffinian number.

2240785 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2240789) by changing a digit.

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, 224074 + ... + 224083.

It is an arithmetic number, because the mean of its divisors is an integer number (672237).

2^2240785 is an apocalyptic number.

It is an amenable number.

2240785 is a deficient number, since it is larger than the sum of its proper divisors (448163).

2240785 is an equidigital number, since it uses as much as digits as its factorization.

2240785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448162.

The product of its (nonzero) digits is 4480, while the sum is 28.

The square root of 2240785 is about 1496.9251818311. The cubic root of 2240785 is about 130.8579350692.

It can be divided in two parts, 2240 and 785, that added together give a square (3025 = 55²).

The spelling of 2240785 in words is "two million, two hundred forty thousand, seven hundred eighty-five".