3785643 has 16 divisors (see below), whose sum is σ = 5652000. Its totient is φ = 2504160.

The previous prime is 3785641. The next prime is 3785651. The reversal of 3785643 is 3465873.

It is a happy number.

3785643 is a `hidden beast` number, since 3 + 7 + 8 + 5 + 643 = 666.

It is not a de Polignac number, because 3785643 - 2¹ = 3785641 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3785598 and 3785607.

It is not an unprimeable number, because it can be changed into a prime (3785641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3553 + ... + 4493.

It is an arithmetic number, because the mean of its divisors is an integer number (353250).

Almost surely, 2^3785643 is an apocalyptic number.

3785643 is a deficient number, since it is larger than the sum of its proper divisors (1866357).

3785643 is a wasteful number, since it uses less digits than its factorization.

3785643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1099 (or 1093 counting only the distinct ones).

The product of its digits is 60480, while the sum is 36.

The square root of 3785643 is about 1945.6728913155. The cubic root of 3785643 is about 155.8523010329.

The spelling of 3785643 in words is "three million, seven hundred eighty-five thousand, six hundred forty-three".