28550258 has 8 divisors (see below), whose sum is σ = 46718640. Its totient is φ = 12977380.

The previous prime is 28550251. The next prime is 28550267. The reversal of 28550258 is 85205582.

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 (28550251) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 648848 + ... + 648891.

It is an arithmetic number, because the mean of its divisors is an integer number (5839830).

Almost surely, 2^28550258 is an apocalyptic number.

28550258 is a deficient number, since it is larger than the sum of its proper divisors (18168382).

28550258 is a wasteful number, since it uses less digits than its factorization.

28550258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1297752.

The product of its (nonzero) digits is 32000, while the sum is 35.

The square root of 28550258 is about 5343.2441456478. The cubic root of 28550258 is about 305.6351825877.

The spelling of 28550258 in words is "twenty-eight million, five hundred fifty thousand, two hundred fifty-eight".