28885207 has 8 divisors (see below), whose sum is σ = 31831184. Its totient is φ = 26042688.

The previous prime is 28885183. The next prime is 28885223. The reversal of 28885207 is 70258882.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28885207 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 28885207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28885807) 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 7 ways as a sum of consecutive naturals, for example, 25278 + ... + 26395.

It is an arithmetic number, because the mean of its divisors is an integer number (3978898).

Almost surely, 2^28885207 is an apocalyptic number.

28885207 is a deficient number, since it is larger than the sum of its proper divisors (2945977).

28885207 is a wasteful number, since it uses less digits than its factorization.

28885207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51729.

The product of its (nonzero) digits is 71680, while the sum is 40.

The square root of 28885207 is about 5374.4959763684. The cubic root of 28885207 is about 306.8257666616.

It can be divided in two parts, 28885 and 207, that added together give a palindrome (29092).

The spelling of 28885207 in words is "twenty-eight million, eight hundred eighty-five thousand, two hundred seven".