28565266 has 4 divisors (see below), whose sum is σ = 42847902. Its totient is φ = 14282632.

The previous prime is 28565209. The next prime is 28565267. The reversal of 28565266 is 66256582.

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., 28462225 + 103041 = 5335^2 + 321^2 .

It is not an unprimeable number, because it can be changed into a prime (28565267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7141315 + ... + 7141318.

Almost surely, 2^28565266 is an apocalyptic number.

28565266 is a deficient number, since it is larger than the sum of its proper divisors (14282636).

28565266 is a wasteful number, since it uses less digits than its factorization.

28565266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14282635.

The product of its digits is 172800, while the sum is 40.

The square root of 28565266 is about 5344.6483513885. The cubic root of 28565266 is about 305.6887275715.

The spelling of 28565266 in words is "twenty-eight million, five hundred sixty-five thousand, two hundred sixty-six".