28057227 has 16 divisors (see below), whose sum is σ = 40909440. Its totient is φ = 16963200.

The previous prime is 28057223. The next prime is 28057229. The reversal of 28057227 is 72275082.

It is not a de Polignac number, because 28057227 - 2² = 28057223 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (28057223) 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 15 ways as a sum of consecutive naturals, for example, 18099 + ... + 19587.

It is an arithmetic number, because the mean of its divisors is an integer number (2556840).

Almost surely, 2^28057227 is an apocalyptic number.

28057227 is a deficient number, since it is larger than the sum of its proper divisors (12852213).

28057227 is a wasteful number, since it uses less digits than its factorization.

28057227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2074.

The product of its (nonzero) digits is 15680, while the sum is 33.

The square root of 28057227 is about 5296.9073052112. The cubic root of 28057227 is about 303.8656312626.

The spelling of 28057227 in words is "twenty-eight million, fifty-seven thousand, two hundred twenty-seven".