28155266 has 8 divisors (see below), whose sum is σ = 44069184. Its totient is φ = 13465540.

The previous prime is 28155251. The next prime is 28155269. The reversal of 28155266 is 66255182.

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

It is not an unprimeable number, because it can be changed into a prime (28155269) 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 in 3 ways as a sum of consecutive naturals, for example, 305990 + ... + 306081.

It is an arithmetic number, because the mean of its divisors is an integer number (5508648).

Almost surely, 2^28155266 is an apocalyptic number.

28155266 is a deficient number, since it is larger than the sum of its proper divisors (15913918).

28155266 is a wasteful number, since it uses less digits than its factorization.

28155266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 612096.

The product of its digits is 28800, while the sum is 35.

The square root of 28155266 is about 5306.1535974753. The cubic root of 28155266 is about 304.2191474425.

The spelling of 28155266 in words is "twenty-eight million, one hundred fifty-five thousand, two hundred sixty-six".