28518329 has 8 divisors (see below), whose sum is σ = 33387648. Its totient is φ = 23847840.

The previous prime is 28518323. The next prime is 28518337. The reversal of 28518329 is 92381582.

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 28518329 - 2²⁰ = 27469753 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28518292 and 28518301.

It is not an unprimeable number, because it can be changed into a prime (28518323) 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, 49397 + ... + 49970.

It is an arithmetic number, because the mean of its divisors is an integer number (4173456).

Almost surely, 2^28518329 is an apocalyptic number.

It is an amenable number.

28518329 is a deficient number, since it is larger than the sum of its proper divisors (4869319).

28518329 is an equidigital number, since it uses as much as digits as its factorization.

28518329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99415.

The product of its digits is 34560, while the sum is 38.

The square root of 28518329 is about 5340.2555182313. The cubic root of 28518329 is about 305.5212050322.

The spelling of 28518329 in words is "twenty-eight million, five hundred eighteen thousand, three hundred twenty-nine".