28248005 has 8 divisors (see below), whose sum is σ = 33960600. Its totient is φ = 22556416.

The previous prime is 28247981. The next prime is 28248019. The reversal of 28248005 is 50084282.

It can be written as a sum of positive squares in 4 ways, for example, as 9409 + 28238596 = 97^2 + 5314^2 .

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 28248005 - 2¹² = 28243909 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2120 + ... + 7809.

It is an arithmetic number, because the mean of its divisors is an integer number (4245075).

Almost surely, 2^28248005 is an apocalyptic number.

It is an amenable number.

28248005 is a deficient number, since it is larger than the sum of its proper divisors (5712595).

28248005 is an equidigital number, since it uses as much as digits as its factorization.

28248005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10503.

The product of its (nonzero) digits is 5120, while the sum is 29.

The square root of 28248005 is about 5314.8852292406. The cubic root of 28248005 is about 304.5527979895.

The spelling of 28248005 in words is "twenty-eight million, two hundred forty-eight thousand, five".