28634258 has 4 divisors (see below), whose sum is σ = 42951390. Its totient is φ = 14317128.

The previous prime is 28634251. The next prime is 28634267. The reversal of 28634258 is 85243682.

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., 27699169 + 935089 = 5263^2 + 967^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28634251) 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 as a sum of consecutive naturals, namely, 7158563 + ... + 7158566.

Almost surely, 2^28634258 is an apocalyptic number.

28634258 is a deficient number, since it is larger than the sum of its proper divisors (14317132).

28634258 is a wasteful number, since it uses less digits than its factorization.

28634258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14317131.

The product of its digits is 92160, while the sum is 38.

The square root of 28634258 is about 5351.0987656742. The cubic root of 28634258 is about 305.9346336804.

The spelling of 28634258 in words is "twenty-eight million, six hundred thirty-four thousand, two hundred fifty-eight".