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78208488 = 23327115299
BaseRepresentation
bin1001010100101…
…01110111101000
312110011101212200
410222111313220
5130010132423
611432140200
71636522041
oct452256750
9173141780
1078208488
1140168216
1222237660
1313283b17
14a55b8c8
156cecd43
hex4a95de8

78208488 has 48 divisors (see below), whose sum is σ = 214812000. Its totient is φ = 25700640.

The previous prime is 78208433. The next prime is 78208513. The reversal of 78208488 is 88480287.

It is a super-2 number, since 2×782084882 = 12233135190492288, which contains 22 as substring.

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, 2538 + ... + 12761.

It is an arithmetic number, because the mean of its divisors is an integer number (4475250).

Almost surely, 278208488 is an apocalyptic number.

It is an amenable number.

78208488 is an abundant number, since it is smaller than the sum of its proper divisors (136603512).

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

78208488 is a wasteful number, since it uses less digits than its factorization.

78208488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15382 (or 15375 counting only the distinct ones).

The product of its (nonzero) digits is 229376, while the sum is 45.

The square root of 78208488 is about 8843.5562982321. The cubic root of 78208488 is about 427.6462124268.

The spelling of 78208488 in words is "seventy-eight million, two hundred eight thousand, four hundred eighty-eight".

Divisors: 1 2 3 4 6 8 9 12 18 24 36 71 72 142 213 284 426 568 639 852 1278 1704 2556 5112 15299 30598 45897 61196 91794 122392 137691 183588 275382 367176 550764 1086229 1101528 2172458 3258687 4344916 6517374 8689832 9776061 13034748 19552122 26069496 39104244 78208488