28124487 has 6 divisors (see below), whose sum is σ = 40624272. Its totient is φ = 18749652.

The previous prime is 28124479. The next prime is 28124489. The reversal of 28124487 is 78442182.

It is not a de Polignac number, because 28124487 - 2³ = 28124479 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28124489) 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 5 ways as a sum of consecutive naturals, for example, 1562463 + ... + 1562480.

It is an arithmetic number, because the mean of its divisors is an integer number (6770712).

Almost surely, 2^28124487 is an apocalyptic number.

28124487 is a deficient number, since it is larger than the sum of its proper divisors (12499785).

28124487 is a wasteful number, since it uses less digits than its factorization.

28124487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3124949 (or 3124946 counting only the distinct ones).

The product of its digits is 28672, while the sum is 36.

The square root of 28124487 is about 5303.2524925747. The cubic root of 28124487 is about 304.1082507780.

The spelling of 28124487 in words is "twenty-eight million, one hundred twenty-four thousand, four hundred eighty-seven".