28099923587 has 4 divisors (see below), whose sum is σ = 28245519240. Its totient is φ = 27954327936.

The previous prime is 28099923539. The next prime is 28099923589. The reversal of 28099923587 is 78532999082.

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 28099923587 - 2²⁶ = 28032814723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28099923589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72797537 + ... + 72797922.

It is an arithmetic number, because the mean of its divisors is an integer number (7061379810).

Almost surely, 2^28099923587 is an apocalyptic number.

28099923587 is a deficient number, since it is larger than the sum of its proper divisors (145595653).

28099923587 is a wasteful number, since it uses less digits than its factorization.

28099923587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145595652.

The product of its (nonzero) digits is 19595520, while the sum is 62.

The spelling of 28099923587 in words is "twenty-eight billion, ninety-nine million, nine hundred twenty-three thousand, five hundred eighty-seven".