28638547 has 16 divisors (see below), whose sum is σ = 33488640. Its totient is φ = 23984928.

The previous prime is 28638539. The next prime is 28638553. The reversal of 28638547 is 74583682.

It is not a de Polignac number, because 28638547 - 2³ = 28638539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28638517) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 106329 + ... + 106597.

It is an arithmetic number, because the mean of its divisors is an integer number (2093040).

Almost surely, 2^28638547 is an apocalyptic number.

28638547 is a deficient number, since it is larger than the sum of its proper divisors (4850093).

28638547 is a wasteful number, since it uses less digits than its factorization.

28638547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 570.

The product of its digits is 322560, while the sum is 43.

The square root of 28638547 is about 5351.4995094833. The cubic root of 28638547 is about 305.9499077871.

The spelling of 28638547 in words is "twenty-eight million, six hundred thirty-eight thousand, five hundred forty-seven".