28472266 has 8 divisors (see below), whose sum is σ = 42738660. Its totient is φ = 14226048.

The previous prime is 28472219. The next prime is 28472273. The reversal of 28472266 is 66227482.

It can be written as a sum of positive squares in 2 ways, for example, as 21893041 + 6579225 = 4679^2 + 2565^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 801 + ... + 7588.

Almost surely, 2^28472266 is an apocalyptic number.

28472266 is a deficient number, since it is larger than the sum of its proper divisors (14266394).

28472266 is a wasteful number, since it uses less digits than its factorization.

28472266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10088.

The product of its digits is 64512, while the sum is 37.

The square root of 28472266 is about 5335.9409666899. The cubic root of 28472266 is about 305.3566230760.

The spelling of 28472266 in words is "twenty-eight million, four hundred seventy-two thousand, two hundred sixty-six".