28039187099 has 48 divisors (see below), whose sum is σ = 37422088704. Its totient is φ = 20493285120.

The previous prime is 28039187083. The next prime is 28039187149. The reversal of 28039187099 is 99078193082.

It is not a de Polignac number, because 28039187099 - 2⁴ = 28039187083 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28039186099) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4417322 + ... + 4423664.

It is an arithmetic number, because the mean of its divisors is an integer number (779626848).

Almost surely, 2^28039187099 is an apocalyptic number.

28039187099 is a deficient number, since it is larger than the sum of its proper divisors (9382901605).

28039187099 is a wasteful number, since it uses less digits than its factorization.

28039187099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6696 (or 6685 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 56.

The spelling of 28039187099 in words is "twenty-eight billion, thirty-nine million, one hundred eighty-seven thousand, ninety-nine".