2780872 has 8 divisors (see below), whose sum is σ = 5214150. Its totient is φ = 1390432.

The previous prime is 2780837. The next prime is 2780873.

2780872 is nontrivially palindromic in base 10.

2780872 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 2353156 + 427716 = 1534^2 + 654^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (2780873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 173797 + ... + 173812.

2^2780872 is an apocalyptic number.

It is an amenable number.

2780872 is a deficient number, since it is larger than the sum of its proper divisors (2433278).

2780872 is a wasteful number, since it uses less digits than its factorization.

2780872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347615 (or 347611 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 34.

The square root of 2780872 is about 1667.5946749735. The cubic root of 2780872 is about 140.6242868770.

The spelling of 2780872 in words is "two million, seven hundred eighty thousand, eight hundred seventy-two".