28934258 has 4 divisors (see below), whose sum is σ = 43401390. Its totient is φ = 14467128.

The previous prime is 28934251. The next prime is 28934261. The reversal of 28934258 is 85243982.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 26553409 + 2380849 = 5153^2 + 1543^2 .

It is not an unprimeable number, because it can be changed into a prime (28934251) 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 as a sum of consecutive naturals, namely, 7233563 + ... + 7233566.

Almost surely, 2^28934258 is an apocalyptic number.

28934258 is a deficient number, since it is larger than the sum of its proper divisors (14467132).

28934258 is a wasteful number, since it uses less digits than its factorization.

28934258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14467131.

The product of its digits is 138240, while the sum is 41.

The square root of 28934258 is about 5379.0573523620. The cubic root of 28934258 is about 306.9993457034. Note that the first 3 decimals are identical.

It can be divided in two parts, 28934 and 258, that added together give a palindrome (29192).

The spelling of 28934258 in words is "twenty-eight million, nine hundred thirty-four thousand, two hundred fifty-eight".