1808281086 has 32 divisors (see below), whose sum is σ = 3666163200. Its totient is φ = 594509760.

The previous prime is 1808281067. The next prime is 1808281093. The reversal of 1808281086 is 6801828081.

It is a super-3 number, since 3×1808281086³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 761481 + ... + 763851.

It is an arithmetic number, because the mean of its divisors is an integer number (114567600).

Almost surely, 2^1808281086 is an apocalyptic number.

1808281086 is an abundant number, since it is smaller than the sum of its proper divisors (1857882114).

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

1808281086 is a wasteful number, since it uses less digits than its factorization.

1808281086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4064.

The product of its (nonzero) digits is 49152, while the sum is 42.

The square root of 1808281086 is about 42523.8884158069. Note that the first 3 decimals coincide. The cubic root of 1808281086 is about 1218.3029989189.

The spelling of 1808281086 in words is "one billion, eight hundred eight million, two hundred eighty-one thousand, eighty-six".