3869685 has 24 divisors (see below), whose sum is σ = 6775704. Its totient is φ = 2042880.

The previous prime is 3869683. The next prime is 3869687. The reversal of 3869685 is 5869683.

It is an interprime number because it is at equal distance from previous prime (3869683) and next prime (3869687).

It can be written as a sum of positive squares in 4 ways, for example, as 509796 + 3359889 = 714^2 + 1833^2 .

It is not a de Polignac number, because 3869685 - 2¹ = 3869683 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 3869685.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3869683) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4705 + ... + 5465.

It is an arithmetic number, because the mean of its divisors is an integer number (282321).

Almost surely, 2^3869685 is an apocalyptic number.

It is an amenable number.

3869685 is a deficient number, since it is larger than the sum of its proper divisors (2906019).

3869685 is a wasteful number, since it uses less digits than its factorization.

3869685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 885 (or 882 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The square root of 3869685 is about 1967.1514939119. The cubic root of 3869685 is about 156.9971871242.

It can be divided in two parts, 38696 and 85, that added together give a triangular number (38781 = T₂₇₈).

The spelling of 3869685 in words is "three million, eight hundred sixty-nine thousand, six hundred eighty-five".