28389999264 has 192 divisors, whose sum is σ = 83260420992. Its totient is φ = 8397619200.

The previous prime is 28389999257. The next prime is 28389999271. The reversal of 28389999264 is 46299998382.

It is an interprime number because it is at equal distance from previous prime (28389999257) and next prime (28389999271).

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 31 ways as a sum of consecutive naturals, for example, 8823384 + ... + 8826600.

It is an arithmetic number, because the mean of its divisors is an integer number (433648026).

Almost surely, 2^28389999264 is an apocalyptic number.

28389999264 is a gapful number since it is divisible by the number (24) 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 28389999264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41630210496).

28389999264 is an abundant number, since it is smaller than the sum of its proper divisors (54870421728).

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

28389999264 is a wasteful number, since it uses less digits than its factorization.

28389999264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3439 (or 3431 counting only the distinct ones).

The product of its digits is 120932352, while the sum is 69.

The spelling of 28389999264 in words is "twenty-eight billion, three hundred eighty-nine million, nine hundred ninety-nine thousand, two hundred sixty-four".