28398346368 has 128 divisors (see below), whose sum is σ = 87836296320. Its totient is φ = 7960682496.

The previous prime is 28398346357. The next prime is 28398346393. The reversal of 28398346368 is 86364389382.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (128).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42796 + ... + 242132.

It is an arithmetic number, because the mean of its divisors is an integer number (686221065).

Almost surely, 2^28398346368 is an apocalyptic number.

28398346368 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28398346368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43918148160).

28398346368 is an abundant number, since it is smaller than the sum of its proper divisors (59437949952).

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

28398346368 is a wasteful number, since it uses less digits than its factorization.

28398346368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199414 (or 199402 counting only the distinct ones).

The product of its digits is 35831808, while the sum is 60.

The spelling of 28398346368 in words is "twenty-eight billion, three hundred ninety-eight million, three hundred forty-six thousand, three hundred sixty-eight".