1808156 has 12 divisors (see below), whose sum is σ = 3616368. Its totient is φ = 774912.

The previous prime is 1808119. The next prime is 1808161. The reversal of 1808156 is 6518081.

1808156 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32261 + ... + 32316.

It is an arithmetic number, because the mean of its divisors is an integer number (301364).

2^1808156 is an apocalyptic number.

It is an amenable number.

1808156 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1808156 is a wasteful number, since it uses less digits than its factorization.

1808156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64588 (or 64586 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 29.

The square root of 1808156 is about 1344.6769128679. The cubic root of 1808156 is about 121.8274906649.

The spelling of 1808156 in words is "one million, eight hundred eight thousand, one hundred fifty-six".