181890968 has 16 divisors (see below), whose sum is σ = 389766480. Its totient is φ = 77953248.

The previous prime is 181890953. The next prime is 181891013. The reversal of 181890968 is 869098181.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1623971 + ... + 1624082.

It is an arithmetic number, because the mean of its divisors is an integer number (24360405).

Almost surely, 2^181890968 is an apocalyptic number.

It is an amenable number.

181890968 is an abundant number, since it is smaller than the sum of its proper divisors (207875512).

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

181890968 is a wasteful number, since it uses less digits than its factorization.

181890968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3248066 (or 3248062 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 50.

The square root of 181890968 is about 13486.6959630593. The cubic root of 181890968 is about 566.5919215523.

The spelling of 181890968 in words is "one hundred eighty-one million, eight hundred ninety thousand, nine hundred sixty-eight".