2785284 has 18 divisors (see below), whose sum is σ = 7040670. Its totient is φ = 928416.

The previous prime is 2785273. The next prime is 2785301. The reversal of 2785284 is 4825872.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1512900 + 1272384 = 1230^2 + 1128^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 77369 = 2785284 / (2 + 7 + 8 + 5 + 2 + 8 + 4).

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 38649 + ... + 38720.

2^2785284 is an apocalyptic number.

It is an amenable number.

2785284 is an abundant number, since it is smaller than the sum of its proper divisors (4255386).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2785284 is a wasteful number, since it uses less digits than its factorization.

2785284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77379 (or 77374 counting only the distinct ones).

The product of its digits is 35840, while the sum is 36.

The square root of 2785284 is about 1668.9170141142. The cubic root of 2785284 is about 140.6986168624.

The spelling of 2785284 in words is "two million, seven hundred eighty-five thousand, two hundred eighty-four".