3685947 has 16 divisors (see below), whose sum is σ = 5056128. Its totient is φ = 2387840.

The previous prime is 3685883. The next prime is 3685949. The reversal of 3685947 is 7495863.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 3685947 - 2⁶ = 3685883 is a prime.

3685947 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 3685899 and 3685908.

It is not an unprimeable number, because it can be changed into a prime (3685949) 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, 28072 + ... + 28202.

It is an arithmetic number, because the mean of its divisors is an integer number (316008).

Almost surely, 2^3685947 is an apocalyptic number.

3685947 is a deficient number, since it is larger than the sum of its proper divisors (1370181).

3685947 is a wasteful number, since it uses less digits than its factorization.

3685947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330.

The product of its digits is 181440, while the sum is 42.

The square root of 3685947 is about 1919.8820276257. The cubic root of 3685947 is about 154.4719736346.

The spelling of 3685947 in words is "three million, six hundred eighty-five thousand, nine hundred forty-seven".