28098605 has 8 divisors (see below), whose sum is σ = 34193664. Its totient is φ = 22162000.

The previous prime is 28098599. The next prime is 28098607. The reversal of 28098605 is 50689082.

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

It is not a de Polignac number, because 28098605 - 2⁴ = 28098589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28098607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39221 + ... + 39930.

It is an arithmetic number, because the mean of its divisors is an integer number (4274208).

Almost surely, 2^28098605 is an apocalyptic number.

It is an amenable number.

28098605 is a deficient number, since it is larger than the sum of its proper divisors (6095059).

28098605 is an equidigital number, since it uses as much as digits as its factorization.

28098605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79227.

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

The square root of 28098605 is about 5300.8117302919. The cubic root of 28098605 is about 304.0149353523.

The spelling of 28098605 in words is "twenty-eight million, ninety-eight thousand, six hundred five".