28081576998 has 12 divisors (see below), whose sum is σ = 60843416868. Its totient is φ = 9360525660.

The previous prime is 28081576987. The next prime is 28081577009. The reversal of 28081576998 is 89967518082.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (28081576987) and next prime (28081577009).

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 780043788 + ... + 780043823.

It is an arithmetic number, because the mean of its divisors is an integer number (5070284739).

Almost surely, 2^28081576998 is an apocalyptic number.

28081576998 is an abundant number, since it is smaller than the sum of its proper divisors (32761839870).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28081576998 is a wasteful number, since it uses less digits than its factorization.

28081576998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1560087619 (or 1560087616 counting only the distinct ones).

The product of its (nonzero) digits is 17418240, while the sum is 63.

The spelling of 28081576998 in words is "twenty-eight billion, eighty-one million, five hundred seventy-six thousand, nine hundred ninety-eight".