28713266 has 8 divisors (see below), whose sum is σ = 43226220. Its totient is φ = 14304528.

The previous prime is 28713253. The next prime is 28713271. The reversal of 28713266 is 66231782.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 26739241 + 1974025 = 5171^2 + 1405^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25361 + ... + 26468.

Almost surely, 2^28713266 is an apocalyptic number.

28713266 is a deficient number, since it is larger than the sum of its proper divisors (14512954).

28713266 is a wasteful number, since it uses less digits than its factorization.

28713266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52108.

The product of its digits is 24192, while the sum is 35.

The square root of 28713266 is about 5358.4760893373. The cubic root of 28713266 is about 306.2157548269.

The spelling of 28713266 in words is "twenty-eight million, seven hundred thirteen thousand, two hundred sixty-six".