28812547 has 8 divisors (see below), whose sum is σ = 29877120. Its totient is φ = 27756480.

The previous prime is 28812523. The next prime is 28812559. The reversal of 28812547 is 74521882.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28812547 - 2⁷ = 28812419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28812517) 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 7 ways as a sum of consecutive naturals, for example, 5229 + ... + 9217.

It is an arithmetic number, because the mean of its divisors is an integer number (3734640).

Almost surely, 2^28812547 is an apocalyptic number.

28812547 is a deficient number, since it is larger than the sum of its proper divisors (1064573).

28812547 is a wasteful number, since it uses less digits than its factorization.

28812547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4253.

The product of its digits is 35840, while the sum is 37.

The square root of 28812547 is about 5367.7320164107. The cubic root of 28812547 is about 306.5682798487.

The spelling of 28812547 in words is "twenty-eight million, eight hundred twelve thousand, five hundred forty-seven".