28000919539 has 4 divisors (see below), whose sum is σ = 28904175040. Its totient is φ = 27097664040.

The previous prime is 28000919483. The next prime is 28000919567. The reversal of 28000919539 is 93591900082.

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 28000919539 - 2¹⁷ = 28000788467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28000919239) 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, 451627704 + ... + 451627765.

It is an arithmetic number, because the mean of its divisors is an integer number (7226043760).

Almost surely, 2^28000919539 is an apocalyptic number.

28000919539 is a deficient number, since it is larger than the sum of its proper divisors (903255501).

28000919539 is an equidigital number, since it uses as much as digits as its factorization.

28000919539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 903255500.

The product of its (nonzero) digits is 174960, while the sum is 46.

The spelling of 28000919539 in words is "twenty-eight billion, nine hundred nineteen thousand, five hundred thirty-nine".