28607985 has 40 divisors (see below), whose sum is σ = 58614336. Its totient is φ = 13076640.

The previous prime is 28607983. The next prime is 28607987. The reversal of 28607985 is 58970682.

It is an interprime number because it is at equal distance from previous prime (28607983) and next prime (28607987).

It is not a de Polignac number, because 28607985 - 2¹ = 28607983 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 28607985.

It is not an unprimeable number, because it can be changed into a prime (28607983) 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 39 ways as a sum of consecutive naturals, for example, 2211 + ... + 7880.

Almost surely, 2^28607985 is an apocalyptic number.

It is an amenable number.

28607985 is an abundant number, since it is smaller than the sum of its proper divisors (30006351).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28607985 is a wasteful number, since it uses less digits than its factorization.

28607985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10115 (or 10106 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 28607985 is about 5348.6432859184. The cubic root of 28607985 is about 305.8410362348.

It can be divided in two parts, 28607 and 985, that added together give a palindrome (29592).

The spelling of 28607985 in words is "twenty-eight million, six hundred seven thousand, nine hundred eighty-five".