181129472 has 36 divisors (see below), whose sum is σ = 370391196. Its totient is φ = 88350720.

The previous prime is 181129471. The next prime is 181129477. The reversal of 181129472 is 274921181.

It can be written as a sum of positive squares in 2 ways, for example, as 7311616 + 173817856 = 2704^2 + 13184^2 .

It is not an unprimeable number, because it can be changed into a prime (181129471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1868 + ... + 19124.

Almost surely, 2^181129472 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 181129472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (185195598).

181129472 is an abundant number, since it is smaller than the sum of its proper divisors (189261724).

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

181129472 is an equidigital number, since it uses as much as digits as its factorization.

181129472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17314 (or 17300 counting only the distinct ones).

The product of its digits is 8064, while the sum is 35.

The square root of 181129472 is about 13458.4349758804. The cubic root of 181129472 is about 565.8001267070.

The spelling of 181129472 in words is "one hundred eighty-one million, one hundred twenty-nine thousand, four hundred seventy-two".