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87988240704 = 2637135035957
BaseRepresentation
bin101000111110010000…
…0100000000101000000
322102010001101202011210
41101330200200011000
52420144442200304
6104230553210120
76233300464050
oct1217440400500
9272101352153
1087988240704
1134352082601
1215077100940
1383b30bb670
144389a61560
15244e944c89
hex147c820140

87988240704 has 112 divisors (see below), whose sum is σ = 286525866368. Its totient is φ = 23205685248.

The previous prime is 87988240693. The next prime is 87988240729. The reversal of 87988240704 is 40704288978.

It is a tau number, because it is divible by the number of its divisors (112).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2500507 + ... + 2535450.

It is an arithmetic number, because the mean of its divisors is an integer number (2558266664).

Almost surely, 287988240704 is an apocalyptic number.

87988240704 is a gapful number since it is divisible by the number (84) formed by its first and last digit.

It is an amenable number.

87988240704 is an abundant number, since it is smaller than the sum of its proper divisors (198537625664).

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

87988240704 is a wasteful number, since it uses less digits than its factorization.

87988240704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5035992 (or 5035982 counting only the distinct ones).

The product of its (nonzero) digits is 7225344, while the sum is 57.

The spelling of 87988240704 in words is "eighty-seven billion, nine hundred eighty-eight million, two hundred forty thousand, seven hundred four".

Divisors: 1 2 3 4 6 7 8 12 13 14 16 21 24 26 28 32 39 42 48 52 56 64 78 84 91 96 104 112 156 168 182 192 208 224 273 312 336 364 416 448 546 624 672 728 832 1092 1248 1344 1456 2184 2496 2912 4368 5824 8736 17472 5035957 10071914 15107871 20143828 30215742 35251699 40287656 60431484 65467441 70503398 80575312 105755097 120862968 130934882 141006796 161150624 196402323 211510194 241725936 261869764 282013592 322301248 392804646 423020388 458272087 483451872 523739528 564027184 785609292 846040776 916544174 966903744 1047479056 1128054368 1374816261 1571218584 1692081552 1833088348 2094958112 2256108736 2749632522 3142437168 3384163104 3666176696 4189916224 5499265044 6284874336 6768326208 7332353392 10998530088 12569748672 14664706784 21997060176 29329413568 43994120352 87988240704