181485328 has 10 divisors (see below), whose sum is σ = 351627854. Its totient is φ = 90742656.

The previous prime is 181485323. The next prime is 181485347. The reversal of 181485328 is 823584181.

It can be written as a sum of positive squares in only one way, i.e., 179774464 + 1710864 = 13408^2 + 1308^2 .

It is not an unprimeable number, because it can be changed into a prime (181485323) 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, 5671401 + ... + 5671432.

Almost surely, 2^181485328 is an apocalyptic number.

It is an amenable number.

181485328 is a deficient number, since it is larger than the sum of its proper divisors (170142526).

181485328 is a wasteful number, since it uses less digits than its factorization.

181485328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11342841 (or 11342835 counting only the distinct ones).

The product of its digits is 61440, while the sum is 40.

The square root of 181485328 is about 13471.6490453099. The cubic root of 181485328 is about 566.1704173707.

The spelling of 181485328 in words is "one hundred eighty-one million, four hundred eighty-five thousand, three hundred twenty-eight".