28180339 has 8 divisors (see below), whose sum is σ = 32550768. Its totient is φ = 24111360.

The previous prime is 28180319. The next prime is 28180357. The reversal of 28180339 is 93308182.

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

It is a cyclic number.

It is not a de Polignac number, because 28180339 - 2¹¹ = 28178291 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28180309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75162 + ... + 75535.

It is an arithmetic number, because the mean of its divisors is an integer number (4068846).

Almost surely, 2^28180339 is an apocalyptic number.

28180339 is a deficient number, since it is larger than the sum of its proper divisors (4370429).

28180339 is a wasteful number, since it uses less digits than its factorization.

28180339 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150725.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 28180339 is about 5308.5157059201. The cubic root of 28180339 is about 304.3094256825.

The spelling of 28180339 in words is "twenty-eight million, one hundred eighty thousand, three hundred thirty-nine".