180028939 has 4 divisors (see below), whose sum is σ = 184894624. Its totient is φ = 175163256.

The previous prime is 180028931. The next prime is 180028951. The reversal of 180028939 is 939820081.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 180028939 - 2³ = 180028931 is a prime.

It is not an unprimeable number, because it can be changed into a prime (180028931) 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 in 3 ways as a sum of consecutive naturals, for example, 2432787 + ... + 2432860.

It is an arithmetic number, because the mean of its divisors is an integer number (46223656).

Almost surely, 2^180028939 is an apocalyptic number.

180028939 is a deficient number, since it is larger than the sum of its proper divisors (4865685).

180028939 is an equidigital number, since it uses as much as digits as its factorization.

180028939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4865684.

The product of its (nonzero) digits is 31104, while the sum is 40.

The square root of 180028939 is about 13417.4863145076. The cubic root of 180028939 is about 564.6518741979.

The spelling of 180028939 in words is "one hundred eighty million, twenty-eight thousand, nine hundred thirty-nine".