28648258 has 8 divisors (see below), whose sum is σ = 44020620. Its totient is φ = 13974720.

The previous prime is 28648253. The next prime is 28648267. The reversal of 28648258 is 85284682.

It can be written as a sum of positive squares in 2 ways, for example, as 27531009 + 1117249 = 5247^2 + 1057^2 .

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

It is not an unprimeable number, because it can be changed into a prime (28648253) 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 3 ways as a sum of consecutive naturals, for example, 174603 + ... + 174766.

Almost surely, 2^28648258 is an apocalyptic number.

28648258 is a deficient number, since it is larger than the sum of its proper divisors (15372362).

28648258 is a wasteful number, since it uses less digits than its factorization.

28648258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349412.

The product of its digits is 245760, while the sum is 43.

The square root of 28648258 is about 5352.4067483703. The cubic root of 28648258 is about 305.9844852373.

The spelling of 28648258 in words is "twenty-eight million, six hundred forty-eight thousand, two hundred fifty-eight".