181372028 has 24 divisors (see below), whose sum is σ = 326093040. Its totient is φ = 88215680.

The previous prime is 181372027. The next prime is 181372033. The reversal of 181372028 is 820273181.

It is a junction number, because it is equal to n+sod(n) for n = 181371985 and 181372003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181372027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62375 + ... + 65217.

It is an arithmetic number, because the mean of its divisors is an integer number (13587210).

Almost surely, 2^181372028 is an apocalyptic number.

It is an amenable number.

181372028 is a deficient number, since it is larger than the sum of its proper divisors (144721012).

181372028 is a wasteful number, since it uses less digits than its factorization.

181372028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3277 (or 3275 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 32.

The square root of 181372028 is about 13467.4432614361. The cubic root of 181372028 is about 566.0525741222.

The spelling of 181372028 in words is "one hundred eighty-one million, three hundred seventy-two thousand, twenty-eight".