2787849 has 12 divisors (see below), whose sum is σ = 4054596. Its totient is φ = 1845792.

The previous prime is 2787781. The next prime is 2787859. The reversal of 2787849 is 9487872.

It can be written as a sum of positive squares in 2 ways, for example, as 705600 + 2082249 = 840^2 + 1443^2 .

It is not a de Polignac number, because 2787849 - 2⁸ = 2787593 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2787859) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 427 + ... + 2399.

It is an arithmetic number, because the mean of its divisors is an integer number (337883).

2^2787849 is an apocalyptic number.

It is an amenable number.

2787849 is a deficient number, since it is larger than the sum of its proper divisors (1266747).

2787849 is a wasteful number, since it uses less digits than its factorization.

2787849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2136 (or 2133 counting only the distinct ones).

The product of its digits is 225792, while the sum is 45.

The square root of 2787849 is about 1669.6852996897. The cubic root of 2787849 is about 140.7417939347.

It can be divided in two parts, 278784 and 9, that multiplied together give a square (2509056 = 1584²).

The spelling of 2787849 in words is "two million, seven hundred eighty-seven thousand, eight hundred forty-nine".