28485587 has 4 divisors (see below), whose sum is σ = 30676800. Its totient is φ = 26294376.

The previous prime is 28485581. The next prime is 28485593. The reversal of 28485587 is 78558482.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (28485581) and next prime (28485593).

It is a cyclic number.

It is not a de Polignac number, because 28485587 - 2⁴ = 28485571 is a prime.

It is a super-2 number, since 2×28485587² = 1622857333469138, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28485581) 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, 1095587 + ... + 1095612.

It is an arithmetic number, because the mean of its divisors is an integer number (7669200).

Almost surely, 2^28485587 is an apocalyptic number.

28485587 is a deficient number, since it is larger than the sum of its proper divisors (2191213).

28485587 is a wasteful number, since it uses less digits than its factorization.

28485587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2191212.

The product of its digits is 716800, while the sum is 47.

The square root of 28485587 is about 5337.1890541745. The cubic root of 28485587 is about 305.4042369116.

The spelling of 28485587 in words is "twenty-eight million, four hundred eighty-five thousand, five hundred eighty-seven".