28208135 has 8 divisors (see below), whose sum is σ = 34278720. Its totient is φ = 22280544.

The previous prime is 28208113. The next prime is 28208153. The reversal of 28208135 is 53180282.

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 28208135 - 2⁶ = 28208071 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28208098 and 28208107.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 35312 + ... + 36101.

It is an arithmetic number, because the mean of its divisors is an integer number (4284840).

Almost surely, 2^28208135 is an apocalyptic number.

28208135 is a deficient number, since it is larger than the sum of its proper divisors (6070585).

28208135 is an equidigital number, since it uses as much as digits as its factorization.

28208135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71497.

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 28208135 is about 5311.1331182715. The cubic root of 28208135 is about 304.4094458330.

The spelling of 28208135 in words is "twenty-eight million, two hundred eight thousand, one hundred thirty-five".