2872836 has 18 divisors (see below), whose sum is σ = 7261982. Its totient is φ = 957600.

The previous prime is 2872823. The next prime is 2872853. The reversal of 2872836 is 6382782.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 2073600 + 799236 = 1440^2 + 894^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 79801 = 2872836 / (2 + 8 + 7 + 2 + 8 + 3 + 6).

It is a nialpdrome in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 2872836.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 39865 + ... + 39936.

2^2872836 is an apocalyptic number.

It is an amenable number.

2872836 is an abundant number, since it is smaller than the sum of its proper divisors (4389146).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2872836 is a wasteful number, since it uses less digits than its factorization.

2872836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79811 (or 79806 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The square root of 2872836 is about 1694.9442468707. The cubic root of 2872836 is about 142.1576639326.

Adding to 2872836 its product of digits (32256), we get a palindrome (2905092).

The spelling of 2872836 in words is "two million, eight hundred seventy-two thousand, eight hundred thirty-six".