28842745780 has 12 divisors (see below), whose sum is σ = 60569766180. Its totient is φ = 11537098304.

The previous prime is 28842745759. The next prime is 28842745787. The reversal of 28842745780 is 8754724882.

It can be written as a sum of positive squares in 2 ways, for example, as 6921574416 + 21921171364 = 83196^2 + 148058^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28842745787) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 721068625 + ... + 721068664.

It is an arithmetic number, because the mean of its divisors is an integer number (5047480515).

Almost surely, 2^28842745780 is an apocalyptic number.

28842745780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28842745780 is an abundant number, since it is smaller than the sum of its proper divisors (31727020400).

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

28842745780 is a wasteful number, since it uses less digits than its factorization.

28842745780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1442137298 (or 1442137296 counting only the distinct ones).

The product of its (nonzero) digits is 8028160, while the sum is 55.

The spelling of 28842745780 in words is "twenty-eight billion, eight hundred forty-two million, seven hundred forty-five thousand, seven hundred eighty".