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87284680 = 2357244533
BaseRepresentation
bin1010011001111…
…01101111001000
320002020112001221
411030331233020
5134321102210
612354451424
72106623200
oct514755710
9202215057
1087284680
11452a72aa
1225293b74
1315111052
14b841400
1579e21da
hex533dbc8

87284680 has 48 divisors (see below), whose sum is σ = 228459420. Its totient is φ = 29925504.

The previous prime is 87284677. The next prime is 87284737. The reversal of 87284680 is 8648278.

It can be written as a sum of positive squares in 2 ways, for example, as 87198244 + 86436 = 9338^2 + 294^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20307 + ... + 24226.

Almost surely, 287284680 is an apocalyptic number.

It is an amenable number.

87284680 is an abundant number, since it is smaller than the sum of its proper divisors (141174740).

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

87284680 is a wasteful number, since it uses less digits than its factorization.

87284680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44558 (or 44547 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 43.

The square root of 87284680 is about 9342.6270395430. The cubic root of 87284680 is about 443.5875427268.

The spelling of 87284680 in words is "eighty-seven million, two hundred eighty-four thousand, six hundred eighty".

Divisors: 1 2 4 5 7 8 10 14 20 28 35 40 49 56 70 98 140 196 245 280 392 490 980 1960 44533 89066 178132 222665 311731 356264 445330 623462 890660 1246924 1558655 1781320 2182117 2493848 3117310 4364234 6234620 8728468 10910585 12469240 17456936 21821170 43642340 87284680