181995472 has 40 divisors (see below), whose sum is σ = 374547456. Its totient is φ = 85372416.

The previous prime is 181995469. The next prime is 181995487. The reversal of 181995472 is 274599181.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 103303 + ... + 105049.

Almost surely, 2^181995472 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 181995472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (187273728).

181995472 is an abundant number, since it is smaller than the sum of its proper divisors (192551984).

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

181995472 is a wasteful number, since it uses less digits than its factorization.

181995472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2155 (or 2149 counting only the distinct ones).

The product of its digits is 181440, while the sum is 46.

The square root of 181995472 is about 13490.5697433429. The cubic root of 181995472 is about 566.7004110624.

The spelling of 181995472 in words is "one hundred eighty-one million, nine hundred ninety-five thousand, four hundred seventy-two".