28568906 has 4 divisors (see below), whose sum is σ = 42853362. Its totient is φ = 14284452.

The previous prime is 28568879. The next prime is 28568927. The reversal of 28568906 is 60986582.

It is a happy number.

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., 21855625 + 6713281 = 4675^2 + 2591^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7142225 + ... + 7142228.

Almost surely, 2^28568906 is an apocalyptic number.

28568906 is a deficient number, since it is larger than the sum of its proper divisors (14284456).

28568906 is a wasteful number, since it uses less digits than its factorization.

28568906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14284455.

The product of its (nonzero) digits is 207360, while the sum is 44.

The square root of 28568906 is about 5344.9888680894. The cubic root of 28568906 is about 305.7017114019.

The spelling of 28568906 in words is "twenty-eight million, five hundred sixty-eight thousand, nine hundred six".