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87580038 = 23713160403
BaseRepresentation
bin1010011100001…
…01110110000110
320002210112020010
411032011312012
5134410030123
612405051050
72112263250
oct516056606
9202715203
1087580038
11454891a7
12253b6a86
13151b5610
14b8bacd0
157a4e993
hex5385d86

87580038 has 32 divisors (see below), whose sum is σ = 215582976. Its totient is φ = 23097888.

The previous prime is 87580037. The next prime is 87580043. The reversal of 87580038 is 83008578.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 87579978 and 87580005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87580033) 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 15 ways as a sum of consecutive naturals, for example, 79656 + ... + 80747.

It is an arithmetic number, because the mean of its divisors is an integer number (6736968).

Almost surely, 287580038 is an apocalyptic number.

87580038 is an abundant number, since it is smaller than the sum of its proper divisors (128002938).

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

87580038 is a wasteful number, since it uses less digits than its factorization.

87580038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160428.

The product of its (nonzero) digits is 53760, while the sum is 39.

The square root of 87580038 is about 9358.4207000968. The cubic root of 87580038 is about 444.0873235436.

The spelling of 87580038 in words is "eighty-seven million, five hundred eighty thousand, thirty-eight".

Divisors: 1 2 3 6 7 13 14 21 26 39 42 78 91 182 273 546 160403 320806 481209 962418 1122821 2085239 2245642 3368463 4170478 6255717 6736926 12511434 14596673 29193346 43790019 87580038