28870825087 has 4 divisors (see below), whose sum is σ = 31091657800. Its totient is φ = 26649992376.

The previous prime is 28870825073. The next prime is 28870825129. The reversal of 28870825087 is 78052807882.

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

It is a cyclic number.

It is not a de Polignac number, because 28870825087 - 2¹¹ = 28870823039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28870825057) 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, 1110416337 + ... + 1110416362.

It is an arithmetic number, because the mean of its divisors is an integer number (7772914450).

Almost surely, 2^28870825087 is an apocalyptic number.

28870825087 is a deficient number, since it is larger than the sum of its proper divisors (2220832713).

28870825087 is a wasteful number, since it uses less digits than its factorization.

28870825087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2220832712.

The product of its (nonzero) digits is 4014080, while the sum is 55.

The spelling of 28870825087 in words is "twenty-eight billion, eight hundred seventy million, eight hundred twenty-five thousand, eighty-seven".