1818837 has 12 divisors (see below), whose sum is σ = 2671084. Its totient is φ = 1192320.

The previous prime is 1818833. The next prime is 1818871. The reversal of 1818837 is 7388181.

It can be written as a sum of positive squares in 2 ways, for example, as 820836 + 998001 = 906^2 + 999^2 .

It is not a de Polignac number, because 1818837 - 2² = 1818833 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1818833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1108 + ... + 2205.

2^1818837 is an apocalyptic number.

It is an amenable number.

1818837 is a deficient number, since it is larger than the sum of its proper divisors (852247).

1818837 is a wasteful number, since it uses less digits than its factorization.

1818837 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3380 (or 3377 counting only the distinct ones).

The product of its digits is 10752, while the sum is 36.

The square root of 1818837 is about 1348.6426509643. The cubic root of 1818837 is about 122.0669031952.

It can be divided in two parts, 18188 and 37, that added together give a square (18225 = 135²).

The spelling of 1818837 in words is "one million, eight hundred eighteen thousand, eight hundred thirty-seven".