28613792987 has 4 divisors (see below), whose sum is σ = 30814854000. Its totient is φ = 26412731976.

The previous prime is 28613792983. The next prime is 28613792989. The reversal of 28613792987 is 78929731682.

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 28613792987 - 2² = 28613792983 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28613792983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1100530487 + ... + 1100530512.

It is an arithmetic number, because the mean of its divisors is an integer number (7703713500).

Almost surely, 2^28613792987 is an apocalyptic number.

28613792987 is a deficient number, since it is larger than the sum of its proper divisors (2201061013).

28613792987 is a wasteful number, since it uses less digits than its factorization.

28613792987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2201061012.

The product of its digits is 18289152, while the sum is 62.

The spelling of 28613792987 in words is "twenty-eight billion, six hundred thirteen million, seven hundred ninety-two thousand, nine hundred eighty-seven".