2781872 has 10 divisors (see below), whose sum is σ = 5389908. Its totient is φ = 1390928.

The previous prime is 2781853. The next prime is 2781887.

2781872 is nontrivially palindromic in base 10.

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

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86918 + ... + 86949.

2^2781872 is an apocalyptic number.

It is an amenable number.

2781872 is a deficient number, since it is larger than the sum of its proper divisors (2608036).

2781872 is a wasteful number, since it uses less digits than its factorization.

2781872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173875 (or 173869 counting only the distinct ones).

The product of its digits is 12544, while the sum is 35.

The square root of 2781872 is about 1667.8944810749. The cubic root of 2781872 is about 140.6411409950.

The spelling of 2781872 in words is "two million, seven hundred eighty-one thousand, eight hundred seventy-two".