28263266 has 4 divisors (see below), whose sum is σ = 42394902. Its totient is φ = 14131632.

The previous prime is 28263253. The next prime is 28263269. The reversal of 28263266 is 66236282.

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., 17181025 + 11082241 = 4145^2 + 3329^2 .

It is not an unprimeable number, because it can be changed into a prime (28263269) 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, 7065815 + ... + 7065818.

Almost surely, 2^28263266 is an apocalyptic number.

28263266 is a deficient number, since it is larger than the sum of its proper divisors (14131636).

28263266 is a wasteful number, since it uses less digits than its factorization.

28263266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14131635.

The product of its digits is 41472, while the sum is 35.

The square root of 28263266 is about 5316.3207201974. The cubic root of 28263266 is about 304.6076330538.

The spelling of 28263266 in words is "twenty-eight million, two hundred sixty-three thousand, two hundred sixty-six".