1808065836 has 72 divisors (see below), whose sum is σ = 4656506400. Its totient is φ = 591413760.

The previous prime is 1808065823. The next prime is 1808065837. The reversal of 1808065836 is 6385608081.

1808065836 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 1808065791 and 1808065800.

It is not an unprimeable number, because it can be changed into a prime (1808065837) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 583780 + ... + 586868.

It is an arithmetic number, because the mean of its divisors is an integer number (64673700).

Almost surely, 2^1808065836 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 1808065836, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2328253200).

1808065836 is an abundant number, since it is smaller than the sum of its proper divisors (2848440564).

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

1808065836 is a wasteful number, since it uses less digits than its factorization.

1808065836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3399 (or 3394 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 45.

The square root of 1808065836 is about 42521.3574101298. The cubic root of 1808065836 is about 1218.2546564850.

The spelling of 1808065836 in words is "one billion, eight hundred eight million, sixty-five thousand, eight hundred thirty-six".