3685857 has 16 divisors (see below), whose sum is σ = 5655552. Its totient is φ = 2091600.

The previous prime is 3685849. The next prime is 3685861. The reversal of 3685857 is 7585863.

It is not a de Polignac number, because 3685857 - 2³ = 3685849 is a prime.

It is an Ulam number.

3685857 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3685837) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2982 + ... + 4032.

It is an arithmetic number, because the mean of its divisors is an integer number (353472).

Almost surely, 2^3685857 is an apocalyptic number.

It is an amenable number.

3685857 is a deficient number, since it is larger than the sum of its proper divisors (1969695).

3685857 is a wasteful number, since it uses less digits than its factorization.

3685857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1228.

The product of its digits is 201600, while the sum is 42.

The square root of 3685857 is about 1919.8585885424. The cubic root of 3685857 is about 154.4707163737.

The spelling of 3685857 in words is "three million, six hundred eighty-five thousand, eight hundred fifty-seven".