28914547 has 4 divisors (see below), whose sum is σ = 29087856. Its totient is φ = 28741240.

The previous prime is 28914517. The next prime is 28914551. The reversal of 28914547 is 74541982.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74541982 = 2 ⋅37270991.

It is a cyclic number.

It is not a de Polignac number, because 28914547 - 2⁷ = 28914419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28914517) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86404 + ... + 86737.

It is an arithmetic number, because the mean of its divisors is an integer number (7271964).

Almost surely, 2^28914547 is an apocalyptic number.

28914547 is a deficient number, since it is larger than the sum of its proper divisors (173309).

28914547 is a wasteful number, since it uses less digits than its factorization.

28914547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173308.

The product of its digits is 80640, while the sum is 40.

The square root of 28914547 is about 5377.2248418678. The cubic root of 28914547 is about 306.9296170709.

The spelling of 28914547 in words is "twenty-eight million, nine hundred fourteen thousand, five hundred forty-seven".