28152266 has 8 divisors (see below), whose sum is σ = 42379524. Its totient is φ = 14025760.

The previous prime is 28152259. The next prime is 28152277. The reversal of 28152266 is 66225182.

It can be written as a sum of positive squares in 2 ways, for example, as 26988025 + 1164241 = 5195^2 + 1079^2 .

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

It is a Curzon number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 24485 + ... + 25608.

Almost surely, 2^28152266 is an apocalyptic number.

28152266 is a deficient number, since it is larger than the sum of its proper divisors (14227258).

28152266 is a wasteful number, since it uses less digits than its factorization.

28152266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50376.

The product of its digits is 11520, while the sum is 32.

The square root of 28152266 is about 5305.8708992964. The cubic root of 28152266 is about 304.2083420055.

The spelling of 28152266 in words is "twenty-eight million, one hundred fifty-two thousand, two hundred sixty-six".