1806849 has 12 divisors (see below), whose sum is σ = 2847312. Its totient is φ = 1095000.

The previous prime is 1806841. The next prime is 1806859. The reversal of 1806849 is 9486081.

It is a happy number.

It is not a de Polignac number, because 1806849 - 2³ = 1806841 is a prime.

1806849 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1806841) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9027 + ... + 9224.

It is an arithmetic number, because the mean of its divisors is an integer number (237276).

2^1806849 is an apocalyptic number.

It is an amenable number.

1806849 is a deficient number, since it is larger than the sum of its proper divisors (1040463).

1806849 is a wasteful number, since it uses less digits than its factorization.

1806849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18268 (or 18265 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 1806849 is about 1344.1908346660. The cubic root of 1806849 is about 121.7981298296.

The spelling of 1806849 in words is "one million, eight hundred six thousand, eight hundred forty-nine".