28278330803 has 8 divisors (see below), whose sum is σ = 28585160448. Its totient is φ = 27972122184.

The previous prime is 28278330767. The next prime is 28278330809. The reversal of 28278330803 is 30803387282.

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

It is a cyclic number.

It is not a de Polignac number, because 28278330803 - 2⁶ = 28278330739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28278330809) 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, 63401 + ... + 246122.

It is an arithmetic number, because the mean of its divisors is an integer number (3573145056).

Almost surely, 2^28278330803 is an apocalyptic number.

28278330803 is a deficient number, since it is larger than the sum of its proper divisors (306829645).

28278330803 is a wasteful number, since it uses less digits than its factorization.

28278330803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310513.

The product of its (nonzero) digits is 387072, while the sum is 44.

The spelling of 28278330803 in words is "twenty-eight billion, two hundred seventy-eight million, three hundred thirty thousand, eight hundred three".