180028538 has 8 divisors (see below), whose sum is σ = 285927732. Its totient is φ = 84719296.

The previous prime is 180028483. The next prime is 180028559. The reversal of 180028538 is 835820081.

180028538 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 179640409 + 388129 = 13403^2 + 623^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 180028498 and 180028507.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2647445 + ... + 2647512.

Almost surely, 2^180028538 is an apocalyptic number.

180028538 is a deficient number, since it is larger than the sum of its proper divisors (105899194).

180028538 is a wasteful number, since it uses less digits than its factorization.

180028538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5294976.

The product of its (nonzero) digits is 15360, while the sum is 35.

The square root of 180028538 is about 13417.4713713129. The cubic root of 180028538 is about 564.6514549587.

The spelling of 180028538 in words is "one hundred eighty million, twenty-eight thousand, five hundred thirty-eight".