1808864 has 12 divisors (see below), whose sum is σ = 3561264. Its totient is φ = 904416.

The previous prime is 1808843. The next prime is 1808869. The reversal of 1808864 is 4688081.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1808869) 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 as a sum of consecutive naturals, namely, 28232 + ... + 28295.

It is an arithmetic number, because the mean of its divisors is an integer number (296772).

2^1808864 is an apocalyptic number.

It is an amenable number.

1808864 is a deficient number, since it is larger than the sum of its proper divisors (1752400).

1808864 is an equidigital number, since it uses as much as digits as its factorization.

1808864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56537 (or 56529 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 35.

The square root of 1808864 is about 1344.9401473672. The cubic root of 1808864 is about 121.8433894789.

The spelling of 1808864 in words is "one million, eight hundred eight thousand, eight hundred sixty-four".