28229747 has 16 divisors (see below), whose sum is σ = 35868672. Its totient is φ = 21612960.

The previous prime is 28229743. The next prime is 28229767. The reversal of 28229747 is 74792282.

It is a cyclic number.

It is not a de Polignac number, because 28229747 - 2² = 28229743 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28229743) 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, 2183 + ... + 7824.

It is an arithmetic number, because the mean of its divisors is an integer number (2241792).

Almost surely, 2^28229747 is an apocalyptic number.

28229747 is a deficient number, since it is larger than the sum of its proper divisors (7638925).

28229747 is a wasteful number, since it uses less digits than its factorization.

28229747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10058.

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

The square root of 28229747 is about 5313.1673227934. The cubic root of 28229747 is about 304.4871682996.

The spelling of 28229747 in words is "twenty-eight million, two hundred twenty-nine thousand, seven hundred forty-seven".