28320035733504 has 384 divisors, whose sum is σ = 89833420338480. Its totient is φ = 8884674625536.

The previous prime is 28320035733491. The next prime is 28320035733529. The reversal of 28320035733504 is 40533753002382.

28320035733504 is a `hidden beast` number, since 2 + 8 + 3 + 20 + 0 + 3 + 573 + 3 + 50 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (384).

It is a self number, because there is not a number n which added to its sum of digits gives 28320035733504.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 135260002 + ... + 135469214.

Almost surely, 2^{28320035733504} is an apocalyptic number.

28320035733504 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 28320035733504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44916710169240).

28320035733504 is an abundant number, since it is smaller than the sum of its proper divisors (61513384604976).

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

28320035733504 is an frugal number, since it uses more digits than its factorization.

28320035733504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209275 (or 209235 counting only the distinct ones).

The product of its (nonzero) digits is 1814400, while the sum is 45.

Adding to 28320035733504 its reverse (40533753002382), we get a palindrome (68853788735886).

The spelling of 28320035733504 in words is "twenty-eight trillion, three hundred twenty billion, thirty-five million, seven hundred thirty-three thousand, five hundred four".