2787872 has 12 divisors (see below), whose sum is σ = 5488686. Its totient is φ = 1393920.

The previous prime is 2787859. The next prime is 2787907.

2787872 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in only one way, i.e., 1948816 + 839056 = 1396^2 + 916^2 .

It is an alternating number because its digits alternate between even and odd.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43529 + ... + 43592.

2^2787872 is an apocalyptic number.

It is an amenable number.

2787872 is a deficient number, since it is larger than the sum of its proper divisors (2700814).

2787872 is an equidigital number, since it uses as much as digits as its factorization.

2787872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87131 (or 87123 counting only the distinct ones).

The product of its digits is 87808, while the sum is 41.

The square root of 2787872 is about 1669.6921872010. The cubic root of 2787872 is about 140.7421809777.

The spelling of 2787872 in words is "two million, seven hundred eighty-seven thousand, eight hundred seventy-two".