2681818 has 8 divisors (see below), whose sum is σ = 4259412. Its totient is φ = 1262016.

The previous prime is 2681807. The next prime is 2681827. The reversal of 2681818 is 8181862.

It can be written as a sum of positive squares in 2 ways, for example, as 2666689 + 15129 = 1633^2 + 123^2 .

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

It is a Harshad number since it is a multiple of its sum of digits (34), and also a Moran number because the ratio is a prime number: 78877 = 2681818 / (2 + 6 + 8 + 1 + 8 + 1 + 8).

2681818 is a modest number, since divided by 1818 gives 268 as remainder.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 39405 + ... + 39472.

2^2681818 is an apocalyptic number.

2681818 is a deficient number, since it is larger than the sum of its proper divisors (1577594).

2681818 is a wasteful number, since it uses less digits than its factorization.

2681818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78896.

The product of its digits is 6144, while the sum is 34.

The square root of 2681818 is about 1637.6257203647. The cubic root of 2681818 is about 138.9343927227.

The spelling of 2681818 in words is "two million, six hundred eighty-one thousand, eight hundred eighteen".