2782138 has 8 divisors (see below), whose sum is σ = 4184820. Its totient is φ = 1387200.

The previous prime is 2782127. The next prime is 2782139. The reversal of 2782138 is 8312872.

It can be written as a sum of positive squares in 2 ways, for example, as 2778889 + 3249 = 1667^2 + 57^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (2782139) 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, 933 + ... + 2536.

2^2782138 is an apocalyptic number.

2782138 is a deficient number, since it is larger than the sum of its proper divisors (1402682).

2782138 is a wasteful number, since it uses less digits than its factorization.

2782138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3872.

The product of its digits is 5376, while the sum is 31.

The square root of 2782138 is about 1667.9742204243. The cubic root of 2782138 is about 140.6456235103.

The spelling of 2782138 in words is "two million, seven hundred eighty-two thousand, one hundred thirty-eight".