1808810540 has 36 divisors (see below), whose sum is σ = 4035099936. Its totient is φ = 680961792.

The previous prime is 1808810539. The next prime is 1808810561. The reversal of 1808810540 is 450188081.

It is a self number, because there is not a number n which added to its sum of digits gives 1808810540.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 150692 + ... + 162251.

Almost surely, 2^1808810540 is an apocalyptic number.

1808810540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1808810540 is an abundant number, since it is smaller than the sum of its proper divisors (2226289396).

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

1808810540 is a wasteful number, since it uses less digits than its factorization.

1808810540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312986 (or 312967 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 35.

The square root of 1808810540 is about 42530.1133316148. The cubic root of 1808810540 is about 1218.4218912853.

The spelling of 1808810540 in words is "one billion, eight hundred eight million, eight hundred ten thousand, five hundred forty".