2840872 has 8 divisors (see below), whose sum is σ = 5326650. Its totient is φ = 1420432.

The previous prime is 2840857. The next prime is 2840911. The reversal of 2840872 is 2780482.

It can be written as a sum of positive squares in only one way, i.e., 2090916 + 749956 = 1446^2 + 866^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 177547 + ... + 177562.

2^2840872 is an apocalyptic number.

It is an amenable number.

2840872 is a deficient number, since it is larger than the sum of its proper divisors (2485778).

2840872 is a wasteful number, since it uses less digits than its factorization.

2840872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355115 (or 355111 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 31.

The square root of 2840872 is about 1685.4886531804. The cubic root of 2840872 is about 141.6284673632.

It can be divided in two parts, 284087 and 2, that added together give a square (284089 = 533²).

The spelling of 2840872 in words is "two million, eight hundred forty thousand, eight hundred seventy-two".