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3785 = 5757
BaseRepresentation
bin111011001001
312012012
4323021
5110120
625305
714015
oct7311
95165
103785
112931
122235
131952
141545
1511c5
hexec9

3785 has 4 divisors (see below), whose sum is σ = 4548. Its totient is φ = 3024.

The previous prime is 3779. The next prime is 3793. The reversal of 3785 is 5873.

3785 = 432 + 442.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5873 = 7839.

It can be written as a sum of positive squares in 2 ways, for example, as 1849 + 1936 = 43^2 + 44^2 .

It is a cyclic number.

It is not a de Polignac number, because 3785 - 24 = 3769 is a prime.

It is a Duffinian number.

It is a plaindrome in base 12.

It is a nialpdrome in base 8 and base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 3785.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 374 + ... + 383.

It is an arithmetic number, because the mean of its divisors is an integer number (1137).

23785 is an apocalyptic number.

3785 is the 44-th centered square number.

It is an amenable number.

3785 is a deficient number, since it is larger than the sum of its proper divisors (763).

3785 is an equidigital number, since it uses as much as digits as its factorization.

3785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 762.

The product of its digits is 840, while the sum is 23.

The square root of 3785 is about 61.5223536611. The cubic root of 3785 is about 15.5843476578.

It can be divided in two parts, 378 and 5, that added together give a palindrome (383).

The spelling of 3785 in words is "three thousand, seven hundred eighty-five".

Divisors: 1 5 757 3785