2681918 has 4 divisors (see below), whose sum is σ = 4022880. Its totient is φ = 1340958.

The previous prime is 2681897. The next prime is 2681927. The reversal of 2681918 is 8191862.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 670478 + ... + 670481.

It is an arithmetic number, because the mean of its divisors is an integer number (1005720).

2^2681918 is an apocalyptic number.

2681918 is a deficient number, since it is larger than the sum of its proper divisors (1340962).

2681918 is a wasteful number, since it uses less digits than its factorization.

2681918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1340961.

The product of its digits is 6912, while the sum is 35.

The square root of 2681918 is about 1637.6562520871. The cubic root of 2681918 is about 138.9361195695.

The spelling of 2681918 in words is "two million, six hundred eighty-one thousand, nine hundred eighteen".