1808234 has 4 divisors (see below), whose sum is σ = 2712354. Its totient is φ = 904116.

The previous prime is 1808207. The next prime is 1808243. The reversal of 1808234 is 4328081.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4328081 = 17 ⋅254593.

It can be written as a sum of positive squares in only one way, i.e., 1682209 + 126025 = 1297^2 + 355^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 452057 + ... + 452060.

2^1808234 is an apocalyptic number.

1808234 is a deficient number, since it is larger than the sum of its proper divisors (904120).

1808234 is an equidigital number, since it uses as much as digits as its factorization.

1808234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 904119.

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 1808234 is about 1344.7059158046. The cubic root of 1808234 is about 121.8292424325.

The spelling of 1808234 in words is "one million, eight hundred eight thousand, two hundred thirty-four".