28280807499 has 8 divisors (see below), whose sum is σ = 43094563840. Its totient is φ = 16160461416.

The previous prime is 28280807479. The next prime is 28280807561. The reversal of 28280807499 is 99470808282.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28280807499 - 2⁷ = 28280807371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28280807459) 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 7 ways as a sum of consecutive naturals, for example, 673352539 + ... + 673352580.

It is an arithmetic number, because the mean of its divisors is an integer number (5386820480).

Almost surely, 2^28280807499 is an apocalyptic number.

28280807499 is a deficient number, since it is larger than the sum of its proper divisors (14813756341).

28280807499 is a wasteful number, since it uses less digits than its factorization.

28280807499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1346705129.

The product of its (nonzero) digits is 4644864, while the sum is 57.

The spelling of 28280807499 in words is "twenty-eight billion, two hundred eighty million, eight hundred seven thousand, four hundred ninety-nine".