28027347780 has 48 divisors (see below), whose sum is σ = 79358348160. Its totient is φ = 7389980928.

The previous prime is 28027347769. The next prime is 28027347833. The reversal of 28027347780 is 8774372082.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2618944 + ... + 2629623.

It is an arithmetic number, because the mean of its divisors is an integer number (1653298920).

Almost surely, 2^28027347780 is an apocalyptic number.

28027347780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28027347780 is an abundant number, since it is smaller than the sum of its proper divisors (51331000380).

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

28027347780 is a wasteful number, since it uses less digits than its factorization.

28027347780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5248668 (or 5248666 counting only the distinct ones).

The product of its (nonzero) digits is 1053696, while the sum is 48.

The spelling of 28027347780 in words is "twenty-eight billion, twenty-seven million, three hundred forty-seven thousand, seven hundred eighty".