28078562028 has 96 divisors (see below), whose sum is σ = 72561307392. Its totient is φ = 8379417600.

The previous prime is 28078562027. The next prime is 28078562041. The reversal of 28078562028 is 82026587082.

It is not an unprimeable number, because it can be changed into a prime (28078562027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7813000 + ... + 7816592.

It is an arithmetic number, because the mean of its divisors is an integer number (755846952).

Almost surely, 2^28078562028 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28078562028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36280653696).

28078562028 is an abundant number, since it is smaller than the sum of its proper divisors (44482745364).

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

28078562028 is a wasteful number, since it uses less digits than its factorization.

28078562028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4495 (or 4493 counting only the distinct ones).

The product of its (nonzero) digits is 860160, while the sum is 48.

The spelling of 28078562028 in words is "twenty-eight billion, seventy-eight million, five hundred sixty-two thousand, twenty-eight".