1808938 has 8 divisors (see below), whose sum is σ = 2751840. Its totient is φ = 891660.

The previous prime is 1808923. The next prime is 1808951. The reversal of 1808938 is 8398081.

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

It is a junction number, because it is equal to n+sod(n) for n = 1808897 and 1808906.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 6228 + ... + 6511.

It is an arithmetic number, because the mean of its divisors is an integer number (343980).

2^1808938 is an apocalyptic number.

1808938 is a deficient number, since it is larger than the sum of its proper divisors (942902).

1808938 is a wasteful number, since it uses less digits than its factorization.

1808938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12812.

The product of its (nonzero) digits is 13824, while the sum is 37.

The square root of 1808938 is about 1344.9676576037. The cubic root of 1808938 is about 121.8450509799.

It can be divided in two parts, 180893 and 8, that added together give a triangular number (180901 = T₆₀₁).

The spelling of 1808938 in words is "one million, eight hundred eight thousand, nine hundred thirty-eight".