1818538 has 8 divisors (see below), whose sum is σ = 2748132. Its totient is φ = 902496.

The previous prime is 1818533. The next prime is 1818539. The reversal of 1818538 is 8358181.

It can be written as a sum of positive squares in 2 ways, for example, as 1671849 + 146689 = 1293^2 + 383^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1818533) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3045 + ... + 3592.

2^1818538 is an apocalyptic number.

1818538 is a deficient number, since it is larger than the sum of its proper divisors (929594).

1818538 is a wasteful number, since it uses less digits than its factorization.

1818538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6776.

The product of its digits is 7680, while the sum is 34.

The square root of 1818538 is about 1348.5317942118. The cubic root of 1818538 is about 122.0602139382.

The spelling of 1818538 in words is "one million, eight hundred eighteen thousand, five hundred thirty-eight".