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86587640 = 2352394117
BaseRepresentation
bin1010010100100…
…11100011111000
320000221002220122
411022103203320
5134131301030
612331512412
72100661046
oct512234370
9200832818
1086587640
1144970637
1224bb8708
1314c289b9
14b6dd396
1579058e5
hex52938f8

86587640 has 32 divisors (see below), whose sum is σ = 203294880. Its totient is φ = 33128832.

The previous prime is 86587639. The next prime is 86587643. The reversal of 86587640 is 4678568.

It is a junction number, because it is equal to n+sod(n) for n = 86587591 and 86587600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86587643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46139 + ... + 47978.

It is an arithmetic number, because the mean of its divisors is an integer number (6352965).

Almost surely, 286587640 is an apocalyptic number.

It is an amenable number.

86587640 is an abundant number, since it is smaller than the sum of its proper divisors (116707240).

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

86587640 is a wasteful number, since it uses less digits than its factorization.

86587640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94151 (or 94147 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 44.

The square root of 86587640 is about 9305.2479816499. The cubic root of 86587640 is about 442.4035816184.

The spelling of 86587640 in words is "eighty-six million, five hundred eighty-seven thousand, six hundred forty".

Divisors: 1 2 4 5 8 10 20 23 40 46 92 115 184 230 460 920 94117 188234 376468 470585 752936 941170 1882340 2164691 3764680 4329382 8658764 10823455 17317528 21646910 43293820 86587640