28000081782 has 48 divisors (see below), whose sum is σ = 62930649600. Its totient is φ = 9330855912.

The previous prime is 28000081777. The next prime is 28000081793. The reversal of 28000081782 is 28718000082.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3039219 + ... + 3048417.

It is an arithmetic number, because the mean of its divisors is an integer number (1311055200).

Almost surely, 2^28000081782 is an apocalyptic number.

28000081782 is an abundant number, since it is smaller than the sum of its proper divisors (34930567818).

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

28000081782 is an equidigital number, since it uses as much as digits as its factorization.

28000081782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15479 (or 15467 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 36.

The spelling of 28000081782 in words is "twenty-eight billion, eighty-one thousand, seven hundred eighty-two".