28878866085 has 8 divisors (see below), whose sum is σ = 46206185760. Its totient is φ = 15402061904.

The previous prime is 28878866077. The next prime is 28878866089. The reversal of 28878866085 is 58066887882.

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 28878866085 - 2³ = 28878866077 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28878866089) 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, 962628855 + ... + 962628884.

It is an arithmetic number, because the mean of its divisors is an integer number (5775773220).

Almost surely, 2^28878866085 is an apocalyptic number.

It is an amenable number.

28878866085 is a deficient number, since it is larger than the sum of its proper divisors (17327319675).

28878866085 is a wasteful number, since it uses less digits than its factorization.

28878866085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1925257747.

The product of its (nonzero) digits is 82575360, while the sum is 66.

The spelling of 28878866085 in words is "twenty-eight billion, eight hundred seventy-eight million, eight hundred sixty-six thousand, eighty-five".