181000988 has 24 divisors (see below), whose sum is σ = 363424992. Its totient is φ = 77266944.

The previous prime is 181000949. The next prime is 181000993. The reversal of 181000988 is 889000181.

181000988 is digitally balanced in base 3 and base 9, because in such bases it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×181000988² = 65522715313952288, which contains 22 as substring.

181000988 is strictly pandigital in base 9.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5381 + ... + 19772.

It is an arithmetic number, because the mean of its divisors is an integer number (15142708).

Almost surely, 2^181000988 is an apocalyptic number.

It is an amenable number.

181000988 is an abundant number, since it is smaller than the sum of its proper divisors (182424004).

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

181000988 is a wasteful number, since it uses less digits than its factorization.

181000988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25421 (or 25419 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 35.

The square root of 181000988 is about 13453.6607657544. The cubic root of 181000988 is about 565.6663118204. Note that the first 3 decimals are identical.

The spelling of 181000988 in words is "one hundred eighty-one million, nine hundred eighty-eight", and thus it is an aban number.