28531110861003 has 8 divisors (see below), whose sum is σ = 40043664366400. Its totient is φ = 18019648964808.

The previous prime is 28531110860983. The next prime is 28531110861031. The reversal of 28531110861003 is 30016801113582.

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

It is not a de Polignac number, because 28531110861003 - 2¹² = 28531110856907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28531110861103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 250272902233 + ... + 250272902346.

It is an arithmetic number, because the mean of its divisors is an integer number (5005458045800).

Almost surely, 2^{28531110861003} is an apocalyptic number.

28531110861003 is a deficient number, since it is larger than the sum of its proper divisors (11512553505397).

28531110861003 is a wasteful number, since it uses less digits than its factorization.

28531110861003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500545804601.

The product of its (nonzero) digits is 34560, while the sum is 39.

Adding to 28531110861003 its reverse (30016801113582), we get a palindrome (58547911974585).

The spelling of 28531110861003 in words is "twenty-eight trillion, five hundred thirty-one billion, one hundred ten million, eight hundred sixty-one thousand, three".