28887258 has 32 divisors (see below), whose sum is σ = 61286400. Its totient is φ = 9051696.

The previous prime is 28887253. The next prime is 28887283. The reversal of 28887258 is 85278882.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (28887253) 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 15 ways as a sum of consecutive naturals, for example, 14935 + ... + 16757.

It is an arithmetic number, because the mean of its divisors is an integer number (1915200).

Almost surely, 2^28887258 is an apocalyptic number.

28887258 is an abundant number, since it is smaller than the sum of its proper divisors (32399142).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28887258 is a wasteful number, since it uses less digits than its factorization.

28887258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1986.

The product of its digits is 573440, while the sum is 48.

The square root of 28887258 is about 5374.6867815716. The cubic root of 28887258 is about 306.8330285650.

The spelling of 28887258 in words is "twenty-eight million, eight hundred eighty-seven thousand, two hundred fifty-eight".