28072543345308 has 768 divisors, whose sum is σ = 97379573760000. Its totient is φ = 6773571889920.

The previous prime is 28072543345283. The next prime is 28072543345309. The reversal of 28072543345308 is 80354334527082.

28072543345308 is a `hidden beast` number, since 2 + 8 + 0 + 7 + 254 + 334 + 53 + 0 + 8 = 666.

It is a super-2 number, since 2×28072543345308² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28072543345309) by changing a digit.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 3906013291 + ... + 3906020477.

It is an arithmetic number, because the mean of its divisors is an integer number (126796320000).

Almost surely, 2^{28072543345308} is an apocalyptic number.

28072543345308 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 28072543345308, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48689786880000).

28072543345308 is an abundant number, since it is smaller than the sum of its proper divisors (69307030414692).

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

28072543345308 is a wasteful number, since it uses less digits than its factorization.

28072543345308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7715 (or 7707 counting only the distinct ones).

The product of its (nonzero) digits is 19353600, while the sum is 54.

The spelling of 28072543345308 in words is "twenty-eight trillion, seventy-two billion, five hundred forty-three million, three hundred forty-five thousand, three hundred eight".