1808112 has 40 divisors (see below), whose sum is σ = 4721920. Its totient is φ = 596160.

The previous prime is 1808089. The next prime is 1808117. The reversal of 1808112 is 2118081.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1808117) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6537 + ... + 6807.

It is an arithmetic number, because the mean of its divisors is an integer number (118048).

2^1808112 is an apocalyptic number.

1808112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1808112 is an abundant number, since it is smaller than the sum of its proper divisors (2913808).

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

1808112 is a wasteful number, since it uses less digits than its factorization.

1808112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421 (or 415 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 21.

The square root of 1808112 is about 1344.6605519610. The cubic root of 1808112 is about 121.8265024660.

The spelling of 1808112 in words is "one million, eight hundred eight thousand, one hundred twelve".