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4487 = 7641
BaseRepresentation
bin1000110000111
320011012
41012013
5120422
632435
716040
oct10607
96135
104487
11340a
12271b
132072
1418c7
1514e2
hex1187

4487 has 4 divisors (see below), whose sum is σ = 5136. Its totient is φ = 3840.

The previous prime is 4483. The next prime is 4493. The reversal of 4487 is 7844.

4487 = T18 + T19 + ... + T31.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 4487 - 22 = 4483 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 4487.

It is not an unprimeable number, because it can be changed into a prime (4481) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 314 + ... + 327.

It is an arithmetic number, because the mean of its divisors is an integer number (1284).

24487 is an apocalyptic number.

4487 is a deficient number, since it is larger than the sum of its proper divisors (649).

4487 is an equidigital number, since it uses as much as digits as its factorization.

4487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 648.

The product of its digits is 896, while the sum is 23.

The square root of 4487 is about 66.9850729641. The cubic root of 4487 is about 16.4937227423.

It can be divided in two parts, 448 and 7, that multiplied together give a square (3136 = 562).

The spelling of 4487 in words is "four thousand, four hundred eighty-seven".

Divisors: 1 7 641 4487