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28008033368 = 237618779349
BaseRepresentation
bin11010000101011010…
…001010110001011000
32200021221001111212012
4122011122022301120
5424330024031433
620511113205052
72011031232650
oct320532126130
980257044765
1028008033368
1110972894017
125517a00788
1328447a1413
1414d9a81360
15addd01848
hex68568ac58

28008033368 has 64 divisors (see below), whose sum is σ = 61077192000. Its totient is φ = 11791941120.

The previous prime is 28008033367. The next prime is 28008033371. The reversal of 28008033368 is 86333080082.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28008033367) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2991158 + ... + 3000506.

It is an arithmetic number, because the mean of its divisors is an integer number (954331125).

Almost surely, 228008033368 is an apocalyptic number.

28008033368 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 28008033368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30538596000).

28008033368 is an abundant number, since it is smaller than the sum of its proper divisors (33069158632).

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

28008033368 is a wasteful number, since it uses less digits than its factorization.

28008033368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10300 (or 10296 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 41.

The spelling of 28008033368 in words is "twenty-eight billion, eight million, thirty-three thousand, three hundred sixty-eight".

Divisors: 1 2 4 7 8 14 28 56 61 122 244 427 488 854 877 1708 1754 3416 3508 6139 7016 9349 12278 18698 24556 37396 49112 53497 65443 74792 106994 130886 213988 261772 374479 427976 523544 570289 748958 1140578 1497916 2281156 2995832 3992023 4562312 7984046 8199073 15968092 16398146 31936184 32796292 57393511 65592584 114787022 229574044 459148088 500143453 1000286906 2000573812 3501004171 4001147624 7002008342 14004016684 28008033368