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87748441 = 11171924697
BaseRepresentation
bin1010011101011…
…10111101011001
320010010002020021
411032232331121
5134430422231
612412430441
72113564234
oct516567531
9203102207
1087748441
1145593780
1225478421
1315244171
14b92241b
157a84811
hex53aef59

87748441 has 16 divisors (see below), whose sum is σ = 106695360. Its totient is φ = 71124480.

The previous prime is 87748433. The next prime is 87748457. The reversal of 87748441 is 14484778.

It is a cyclic number.

It is not a de Polignac number, because 87748441 - 23 = 87748433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87748471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8796 + ... + 15901.

It is an arithmetic number, because the mean of its divisors is an integer number (6668460).

Almost surely, 287748441 is an apocalyptic number.

It is an amenable number.

87748441 is a deficient number, since it is larger than the sum of its proper divisors (18946919).

87748441 is a wasteful number, since it uses less digits than its factorization.

87748441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24744.

The product of its digits is 200704, while the sum is 43.

The square root of 87748441 is about 9367.4137839641. The cubic root of 87748441 is about 444.3717786037.

The spelling of 87748441 in words is "eighty-seven million, seven hundred forty-eight thousand, four hundred forty-one".

Divisors: 1 11 17 19 187 209 323 3553 24697 271667 419849 469243 4618339 5161673 7977131 87748441