28487547 has 24 divisors (see below), whose sum is σ = 46844928. Its totient is φ = 16513200.

The previous prime is 28487533. The next prime is 28487551. The reversal of 28487547 is 74578482.

28487547 is a `hidden beast` number, since 28 + 4 + 87 + 547 = 666.

It is not a de Polignac number, because 28487547 - 2⁴ = 28487531 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28487527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3979 + ... + 8532.

It is an arithmetic number, because the mean of its divisors is an integer number (1951872).

Almost surely, 2^28487547 is an apocalyptic number.

28487547 is a deficient number, since it is larger than the sum of its proper divisors (18357381).

28487547 is a wasteful number, since it uses less digits than its factorization.

28487547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12551 (or 12548 counting only the distinct ones).

The product of its digits is 501760, while the sum is 45.

The square root of 28487547 is about 5337.3726682704. The cubic root of 28487547 is about 305.4112413729.

The spelling of 28487547 in words is "twenty-eight million, four hundred eighty-seven thousand, five hundred forty-seven".