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87010885 = 51310912281
BaseRepresentation
bin1010010111110…
…10111001000101
320001201121111101
411023322321011
5134233322020
612344540101
72104403023
oct513727105
9201647441
1087010885
114512a625
1225181631
1315046540
14b7ad713
15798b00a
hex52fae45

87010885 has 16 divisors (see below), whose sum is σ = 113485680. Its totient is φ = 63659520.

The previous prime is 87010877. The next prime is 87010921. The reversal of 87010885 is 58801078.

It can be written as a sum of positive squares in 8 ways, for example, as 185761 + 86825124 = 431^2 + 9318^2 .

It is not a de Polignac number, because 87010885 - 23 = 87010877 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 945 + ... + 13225.

It is an arithmetic number, because the mean of its divisors is an integer number (7092855).

Almost surely, 287010885 is an apocalyptic number.

It is an amenable number.

87010885 is a deficient number, since it is larger than the sum of its proper divisors (26474795).

87010885 is a wasteful number, since it uses less digits than its factorization.

87010885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12408.

The product of its (nonzero) digits is 17920, while the sum is 37.

The square root of 87010885 is about 9327.9625320860. The cubic root of 87010885 is about 443.1232410743.

The spelling of 87010885 in words is "eighty-seven million, ten thousand, eight hundred eighty-five".

Divisors: 1 5 13 65 109 545 1417 7085 12281 61405 159653 798265 1338629 6693145 17402177 87010885