28242817 has 8 divisors (see below), whose sum is σ = 29319552. Its totient is φ = 27186000.

The previous prime is 28242791. The next prime is 28242859. The reversal of 28242817 is 71824282.

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 28242817 - 2¹⁹ = 27718529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28242517) 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, 2059 + ... + 7792.

It is an arithmetic number, because the mean of its divisors is an integer number (3664944).

Almost surely, 2^28242817 is an apocalyptic number.

It is an amenable number.

28242817 is a deficient number, since it is larger than the sum of its proper divisors (1076735).

28242817 is an equidigital number, since it uses as much as digits as its factorization.

28242817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9959.

The product of its digits is 14336, while the sum is 34.

The square root of 28242817 is about 5314.3971436090. The cubic root of 28242817 is about 304.5341522284.

The spelling of 28242817 in words is "twenty-eight million, two hundred forty-two thousand, eight hundred seventeen".