28083669780 has 24 divisors (see below), whose sum is σ = 78634275552. Its totient is φ = 7488978592.

The previous prime is 28083669773. The next prime is 28083669781. The reversal of 28083669780 is 8796638082.

It is a self number, because there is not a number n which added to its sum of digits gives 28083669780.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28083669781) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 234030522 + ... + 234030641.

It is an arithmetic number, because the mean of its divisors is an integer number (3276428148).

Almost surely, 2^28083669780 is an apocalyptic number.

28083669780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28083669780 is an abundant number, since it is smaller than the sum of its proper divisors (50550605772).

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

28083669780 is a wasteful number, since it uses less digits than its factorization.

28083669780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468061175 (or 468061173 counting only the distinct ones).

The product of its (nonzero) digits is 6967296, while the sum is 57.

The spelling of 28083669780 in words is "twenty-eight billion, eighty-three million, six hundred sixty-nine thousand, seven hundred eighty".