3685406 has 4 divisors (see below), whose sum is σ = 5528112. Its totient is φ = 1842702.

The previous prime is 3685403. The next prime is 3685417. The reversal of 3685406 is 6045863.

3685406 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3685403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 921350 + ... + 921353.

It is an arithmetic number, because the mean of its divisors is an integer number (1382028).

Almost surely, 2^3685406 is an apocalyptic number.

3685406 is a deficient number, since it is larger than the sum of its proper divisors (1842706).

3685406 is a wasteful number, since it uses less digits than its factorization.

3685406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1842705.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 3685406 is about 1919.7411283816. The cubic root of 3685406 is about 154.4644157915.

The spelling of 3685406 in words is "three million, six hundred eighty-five thousand, four hundred six".