28313266 has 4 divisors (see below), whose sum is σ = 42469902. Its totient is φ = 14156632.

The previous prime is 28313239. The next prime is 28313273. The reversal of 28313266 is 66231382.

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., 28313041 + 225 = 5321^2 + 15^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7078315 + ... + 7078318.

Almost surely, 2^28313266 is an apocalyptic number.

28313266 is a deficient number, since it is larger than the sum of its proper divisors (14156636).

28313266 is a wasteful number, since it uses less digits than its factorization.

28313266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14156635.

The product of its digits is 10368, while the sum is 31.

The square root of 28313266 is about 5321.0211426004. The cubic root of 28313266 is about 304.7871524013.

The spelling of 28313266 in words is "twenty-eight million, three hundred thirteen thousand, two hundred sixty-six".