2784085 has 4 divisors (see below), whose sum is σ = 3340908. Its totient is φ = 2227264.

The previous prime is 2784083. The next prime is 2784091. The reversal of 2784085 is 5804872.

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 552049 + 2232036 = 743^2 + 1494^2 .

It is a cyclic number.

It is not a de Polignac number, because 2784085 - 2¹ = 2784083 is a prime.

It is a super-2 number, since 2×2784085² = 15502258574450, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2784085.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2784083) 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 3 ways as a sum of consecutive naturals, for example, 278404 + ... + 278413.

It is an arithmetic number, because the mean of its divisors is an integer number (835227).

2^2784085 is an apocalyptic number.

It is an amenable number.

2784085 is a deficient number, since it is larger than the sum of its proper divisors (556823).

2784085 is an equidigital number, since it uses as much as digits as its factorization.

2784085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 556822.

The product of its (nonzero) digits is 17920, while the sum is 34.

The square root of 2784085 is about 1668.5577604626. The cubic root of 2784085 is about 140.6784248037.

It can be divided in two parts, 27840 and 85, that multiplied together give a triangular number (2366400 = T₂₁₇₅).

The spelling of 2784085 in words is "two million, seven hundred eighty-four thousand, eighty-five".