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87107652 = 223210123957
BaseRepresentation
bin1010011000100…
…10100001000100
320001220112020100
411030102201010
5134244421102
612351004100
72105255112
oct514224104
9201815210
1087107652
11451962a5
1225209630
131507b5b8
14b7d6ab2
1579a9a1c
hex5312844

87107652 has 36 divisors (see below), whose sum is σ = 222378156. Its totient is φ = 28747200.

The previous prime is 87107633. The next prime is 87107653. The reversal of 87107652 is 25670178.

It can be written as a sum of positive squares in 2 ways, for example, as 78428736 + 8678916 = 8856^2 + 2946^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (87107653) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8343 + ... + 15614.

It is an arithmetic number, because the mean of its divisors is an integer number (6177171).

Almost surely, 287107652 is an apocalyptic number.

It is an amenable number.

87107652 is an abundant number, since it is smaller than the sum of its proper divisors (135270504).

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

87107652 is a wasteful number, since it uses less digits than its factorization.

87107652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24068 (or 24063 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 36.

The square root of 87107652 is about 9333.1480219699. The cubic root of 87107652 is about 443.2874497271.

The spelling of 87107652 in words is "eighty-seven million, one hundred seven thousand, six hundred fifty-two".

Divisors: 1 2 3 4 6 9 12 18 36 101 202 303 404 606 909 1212 1818 3636 23957 47914 71871 95828 143742 215613 287484 431226 862452 2419657 4839314 7258971 9678628 14517942 21776913 29035884 43553826 87107652