28974227 has 4 divisors (see below), whose sum is σ = 30234000. Its totient is φ = 27714456.

The previous prime is 28974203. The next prime is 28974233. The reversal of 28974227 is 72247982.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28974227 - 2¹⁸ = 28712083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28974247) 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, 629852 + ... + 629897.

It is an arithmetic number, because the mean of its divisors is an integer number (7558500).

Almost surely, 2^28974227 is an apocalyptic number.

28974227 is a deficient number, since it is larger than the sum of its proper divisors (1259773).

28974227 is a wasteful number, since it uses less digits than its factorization.

28974227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1259772.

The product of its digits is 112896, while the sum is 41.

The square root of 28974227 is about 5382.7713122517. The cubic root of 28974227 is about 307.1406408555.

The spelling of 28974227 in words is "twenty-eight million, nine hundred seventy-four thousand, two hundred twenty-seven".