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87088745 = 5158311003
BaseRepresentation
bin1010011000011…
…01111001101001
320001212120022002
411030031321221
5134243314440
612350340345
72105146022
oct514157151
9201776262
1087088745
1145183077
12251ba6b5
1315072b03
14b7cdc49
1579a4115
hex530de69

87088745 has 8 divisors (see below), whose sum is σ = 104582016. Its totient is φ = 69620656.

The previous prime is 87088721. The next prime is 87088747. The reversal of 87088745 is 54788078.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-87088745 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 87088745.

It is not an unprimeable number, because it can be changed into a prime (87088747) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2414 + ... + 13416.

It is an arithmetic number, because the mean of its divisors is an integer number (13072752).

Almost surely, 287088745 is an apocalyptic number.

It is an amenable number.

87088745 is a deficient number, since it is larger than the sum of its proper divisors (17493271).

87088745 is a wasteful number, since it uses less digits than its factorization.

87088745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12591.

The product of its (nonzero) digits is 501760, while the sum is 47.

The square root of 87088745 is about 9332.1350718900. The cubic root of 87088745 is about 443.2553750774.

The spelling of 87088745 in words is "eighty-seven million, eighty-eight thousand, seven hundred forty-five".

Divisors: 1 5 1583 7915 11003 55015 17417749 87088745