28587487 has 8 divisors (see below), whose sum is σ = 29578752. Its totient is φ = 27600600.

The previous prime is 28587463. The next prime is 28587491. The reversal of 28587487 is 78478582.

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 28587487 - 2¹⁵ = 28554719 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28587487.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28587407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17412 + ... + 18982.

It is an arithmetic number, because the mean of its divisors is an integer number (3697344).

Almost surely, 2^28587487 is an apocalyptic number.

28587487 is a deficient number, since it is larger than the sum of its proper divisors (991265).

28587487 is a wasteful number, since it uses less digits than its factorization.

28587487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2189.

The product of its digits is 1003520, while the sum is 49.

The square root of 28587487 is about 5346.7267556889. The cubic root of 28587487 is about 305.7679723977.

The spelling of 28587487 in words is "twenty-eight million, five hundred eighty-seven thousand, four hundred eighty-seven".