2806018 has 4 divisors (see below), whose sum is σ = 4209030. Its totient is φ = 1403008.

The previous prime is 2806007. The next prime is 2806021. The reversal of 2806018 is 8106082.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8106082 = 2 ⋅4053041.

It can be written as a sum of positive squares in only one way, i.e., 1646089 + 1159929 = 1283^2 + 1077^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2805983 and 2806001.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 701503 + ... + 701506.

2^2806018 is an apocalyptic number.

2806018 is a deficient number, since it is larger than the sum of its proper divisors (1403012).

2806018 is a wasteful number, since it uses less digits than its factorization.

2806018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1403011.

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 2806018 is about 1675.1173093249. The cubic root of 2806018 is about 141.0468801075.

The spelling of 2806018 in words is "two million, eight hundred six thousand, eighteen".