181484872 has 8 divisors (see below), whose sum is σ = 340284150. Its totient is φ = 90742432.

The previous prime is 181484851. The next prime is 181484873. The reversal of 181484872 is 278484181.

It can be written as a sum of positive squares in only one way, i.e., 177049636 + 4435236 = 13306^2 + 2106^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (181484873) by changing a digit.

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 as a sum of consecutive naturals, namely, 11342797 + ... + 11342812.

Almost surely, 2^181484872 is an apocalyptic number.

It is an amenable number.

181484872 is a deficient number, since it is larger than the sum of its proper divisors (158799278).

181484872 is a wasteful number, since it uses less digits than its factorization.

181484872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22685615 (or 22685611 counting only the distinct ones).

The product of its digits is 114688, while the sum is 43.

The square root of 181484872 is about 13471.6321208679. The cubic root of 181484872 is about 566.1699431837.

The spelling of 181484872 in words is "one hundred eighty-one million, four hundred eighty-four thousand, eight hundred seventy-two".