181839868 has 12 divisors (see below), whose sum is σ = 363679792. Its totient is φ = 77931360.

The previous prime is 181839859. The next prime is 181839881. The reversal of 181839868 is 868938181.

181839868 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3247113 + ... + 3247168.

Almost surely, 2^181839868 is an apocalyptic number.

It is an amenable number.

181839868 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

181839868 is a wasteful number, since it uses less digits than its factorization.

181839868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6494292 (or 6494290 counting only the distinct ones).

The product of its digits is 663552, while the sum is 52.

The square root of 181839868 is about 13484.8013704318. The cubic root of 181839868 is about 566.5388576037.

The spelling of 181839868 in words is "one hundred eighty-one million, eight hundred thirty-nine thousand, eight hundred sixty-eight".