3685655 has 4 divisors (see below), whose sum is σ = 4422792. Its totient is φ = 2948520.

The previous prime is 3685631. The next prime is 3685657. The reversal of 3685655 is 5565863.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5565863 = 1657 ⋅3359.

It is not a de Polignac number, because 3685655 - 2¹⁶ = 3620119 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3685657) 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, 368561 + ... + 368570.

It is an arithmetic number, because the mean of its divisors is an integer number (1105698).

Almost surely, 2^3685655 is an apocalyptic number.

3685655 is a deficient number, since it is larger than the sum of its proper divisors (737137).

3685655 is an equidigital number, since it uses as much as digits as its factorization.

3685655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 737136.

The product of its digits is 108000, while the sum is 38.

The square root of 3685655 is about 1919.8059797802. The cubic root of 3685655 is about 154.4678944470.

The spelling of 3685655 in words is "three million, six hundred eighty-five thousand, six hundred fifty-five".