3986785 has 16 divisors (see below), whose sum is σ = 5261760. Its totient is φ = 2875840.

The previous prime is 3986783. The next prime is 3986803. The reversal of 3986785 is 5876893.

It is not a de Polignac number, because 3986785 - 2¹ = 3986783 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3986783) 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, 9306 + ... + 9724.

It is an arithmetic number, because the mean of its divisors is an integer number (328860).

Almost surely, 2^3986785 is an apocalyptic number.

It is an amenable number.

3986785 is a deficient number, since it is larger than the sum of its proper divisors (1274975).

3986785 is a wasteful number, since it uses less digits than its factorization.

3986785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 608.

The product of its digits is 362880, while the sum is 46.

The square root of 3986785 is about 1996.6935167922. The cubic root of 3986785 is about 158.5650997895.

The spelling of 3986785 in words is "three million, nine hundred eighty-six thousand, seven hundred eighty-five".