28736258 has 8 divisors (see below), whose sum is σ = 43153020. Its totient is φ = 14351920.

The previous prime is 28736251. The next prime is 28736261. The reversal of 28736258 is 85263782.

It can be written as a sum of positive squares in 2 ways, for example, as 28697449 + 38809 = 5357^2 + 197^2 .

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28736251) 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, 5753 + ... + 9516.

Almost surely, 2^28736258 is an apocalyptic number.

28736258 is a deficient number, since it is larger than the sum of its proper divisors (14416762).

28736258 is a wasteful number, since it uses less digits than its factorization.

28736258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16212.

The product of its digits is 161280, while the sum is 41.

The square root of 28736258 is about 5360.6210461102. The cubic root of 28736258 is about 306.2974665840.

The spelling of 28736258 in words is "twenty-eight million, seven hundred thirty-six thousand, two hundred fifty-eight".