28769875398 has 96 divisors (see below), whose sum is σ = 70106897952. Its totient is φ = 8450956800.

The previous prime is 28769875397. The next prime is 28769875429. The reversal of 28769875398 is 89357896782.

28769875398 is a `hidden beast` number, since 2 + 8 + 7 + 6 + 9 + 87 + 539 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28769875391) 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 47 ways as a sum of consecutive naturals, for example, 1263240 + ... + 1285812.

It is an arithmetic number, because the mean of its divisors is an integer number (730280187).

Almost surely, 2^28769875398 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28769875398, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35053448976).

28769875398 is an abundant number, since it is smaller than the sum of its proper divisors (41337022554).

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

28769875398 is a wasteful number, since it uses less digits than its factorization.

28769875398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22790 (or 22787 counting only the distinct ones).

The product of its digits is 365783040, while the sum is 72.

The spelling of 28769875398 in words is "twenty-eight billion, seven hundred sixty-nine million, eight hundred seventy-five thousand, three hundred ninety-eight".