28126454780 has 24 divisors (see below), whose sum is σ = 62540000208. Its totient is φ = 10588782848.

The previous prime is 28126454683. The next prime is 28126454791. The reversal of 28126454780 is 8745462182.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41362094 + ... + 41362773.

It is an arithmetic number, because the mean of its divisors is an integer number (2605833342).

Almost surely, 2^28126454780 is an apocalyptic number.

28126454780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28126454780 is an abundant number, since it is smaller than the sum of its proper divisors (34413545428).

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

28126454780 is a wasteful number, since it uses less digits than its factorization.

28126454780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82724893 (or 82724891 counting only the distinct ones).

The product of its (nonzero) digits is 860160, while the sum is 47.

The spelling of 28126454780 in words is "twenty-eight billion, one hundred twenty-six million, four hundred fifty-four thousand, seven hundred eighty".