3985765 has 16 divisors (see below), whose sum is σ = 5499648. Its totient is φ = 2716416.

The previous prime is 3985721. The next prime is 3985777. The reversal of 3985765 is 5675893.

It is a cyclic number.

It is not a de Polignac number, because 3985765 - 2⁷ = 3985637 is a prime.

It is a d-powerful number, because it can be written as 3 + 9² + 8⁵ + 5⁹ + 7 + 6⁶ + 5⁹ .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8989 + ... + 9421.

It is an arithmetic number, because the mean of its divisors is an integer number (343728).

Almost surely, 2^3985765 is an apocalyptic number.

3985765 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3985765 is a deficient number, since it is larger than the sum of its proper divisors (1513883).

3985765 is a wasteful number, since it uses less digits than its factorization.

3985765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 708.

The product of its digits is 226800, while the sum is 43.

The square root of 3985765 is about 1996.4380781782. The cubic root of 3985765 is about 158.5515759270.

The spelling of 3985765 in words is "three million, nine hundred eighty-five thousand, seven hundred sixty-five".