2782775 has 12 divisors (see below), whose sum is σ = 3496800. Its totient is φ = 2196480.

The previous prime is 2782771. The next prime is 2782783. The reversal of 2782775 is 5772872.

It is not a de Polignac number, because 2782775 - 2² = 2782771 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2782771) 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 11 ways as a sum of consecutive naturals, for example, 1271 + ... + 2679.

It is an arithmetic number, because the mean of its divisors is an integer number (291400).

2^2782775 is an apocalyptic number.

2782775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2782775 is a deficient number, since it is larger than the sum of its proper divisors (714025).

2782775 is a wasteful number, since it uses less digits than its factorization.

2782775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1498 (or 1493 counting only the distinct ones).

The product of its digits is 54880, while the sum is 38.

The square root of 2782775 is about 1668.1651596889. The cubic root of 2782775 is about 140.6563567935.

The spelling of 2782775 in words is "two million, seven hundred eighty-two thousand, seven hundred seventy-five".