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87433774168 = 23133167715701
BaseRepresentation
bin101000101101101110…
…1011000010001011000
322100200102001221002011
41101123131120101120
52413031021233133
6104055545115304
76213455550406
oct1213335302130
9270612057064
1087433774168
11340980a46a4
1214b41488b34
138325276160
14433616c476
15241ae1d6cd
hex145b758458

87433774168 has 128 divisors (see below), whose sum is σ = 187602186240. Its totient is φ = 37920960000.

The previous prime is 87433774151. The next prime is 87433774231. The reversal of 87433774168 is 86147733478.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15333718 + ... + 15339418.

It is an arithmetic number, because the mean of its divisors is an integer number (1465642080).

Almost surely, 287433774168 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87433774168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93801093120).

87433774168 is an abundant number, since it is smaller than the sum of its proper divisors (100168412072).

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

87433774168 is a wasteful number, since it uses less digits than its factorization.

87433774168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5889 (or 5885 counting only the distinct ones).

The product of its digits is 18966528, while the sum is 58.

The spelling of 87433774168 in words is "eighty-seven billion, four hundred thirty-three million, seven hundred seventy-four thousand, one hundred sixty-eight".

Divisors: 1 2 4 8 13 26 31 52 62 67 71 104 124 134 142 248 268 284 403 536 568 806 871 923 1612 1742 1846 2077 2201 3224 3484 3692 4154 4402 4757 5701 6968 7384 8308 8804 9514 11402 16616 17608 19028 22804 27001 28613 38056 45608 54002 57226 61841 74113 108004 114452 123682 147467 148226 176731 216008 228904 247364 294934 296452 353462 381967 404771 494728 589868 592904 706924 763934 809542 1179736 1413848 1527868 1619084 1917071 2297503 3055736 3238168 3834142 4595006 4965571 5262023 7668284 9190012 9931142 10524046 11840977 12547901 15336568 18380024 19862284 21048092 23681954 25095802 27119657 39724568 42096184 47363908 50191604 54239314 94727816 100383208 108478628 153932701 163122713 216957256 307865402 326245426 352555541 615730804 652490852 705111082 840709367 1231461608 1304981704 1410222164 1681418734 2820444328 3362837468 6725674936 10929221771 21858443542 43716887084 87433774168