1808136 has 64 divisors (see below), whose sum is σ = 5486400. Its totient is φ = 547200.

The previous prime is 1808119. The next prime is 1808161. The reversal of 1808136 is 6318081.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1996 + ... + 2756.

It is an arithmetic number, because the mean of its divisors is an integer number (85725).

2^1808136 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1808136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2743200).

1808136 is an abundant number, since it is smaller than the sum of its proper divisors (3678264).

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

1808136 is a wasteful number, since it uses less digits than its factorization.

1808136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 787 (or 777 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 1808136 is about 1344.6694761167. The cubic root of 1808136 is about 121.8270414856.

The spelling of 1808136 in words is "one million, eight hundred eight thousand, one hundred thirty-six".