28558366 has 4 divisors (see below), whose sum is σ = 42837552. Its totient is φ = 14279182.

The previous prime is 28558357. The next prime is 28558373. The reversal of 28558366 is 66385582.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

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, 7139590 + ... + 7139593.

It is an arithmetic number, because the mean of its divisors is an integer number (10709388).

Almost surely, 2^28558366 is an apocalyptic number.

28558366 is a deficient number, since it is larger than the sum of its proper divisors (14279186).

28558366 is a wasteful number, since it uses less digits than its factorization.

28558366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14279185.

The product of its digits is 345600, while the sum is 43.

The square root of 28558366 is about 5344.0028068855. The cubic root of 28558366 is about 305.6641123380.

The spelling of 28558366 in words is "twenty-eight million, five hundred fifty-eight thousand, three hundred sixty-six".