2781879 has 8 divisors (see below), whose sum is σ = 3721200. Its totient is φ = 1848576.

The previous prime is 2781853. The next prime is 2781887. The reversal of 2781879 is 9781872.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2781879 - 2¹⁷ = 2650807 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2781879.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2781379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 282 + ... + 2375.

It is an arithmetic number, because the mean of its divisors is an integer number (465150).

2^2781879 is an apocalyptic number.

2781879 is a deficient number, since it is larger than the sum of its proper divisors (939321).

2781879 is a wasteful number, since it uses less digits than its factorization.

2781879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3009.

The product of its digits is 56448, while the sum is 42.

The square root of 2781879 is about 1667.8965795276. The cubic root of 2781879 is about 140.6412589596.

The spelling of 2781879 in words is "two million, seven hundred eighty-one thousand, eight hundred seventy-nine".