3689864 has 8 divisors (see below), whose sum is σ = 6918510. Its totient is φ = 1844928.

The previous prime is 3689863. The next prime is 3689869. The reversal of 3689864 is 4689863.

It can be written as a sum of positive squares in only one way, i.e., 2748964 + 940900 = 1658^2 + 970^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (3689863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 230609 + ... + 230624.

Almost surely, 2^3689864 is an apocalyptic number.

It is an amenable number.

3689864 is a deficient number, since it is larger than the sum of its proper divisors (3228646).

3689864 is a wasteful number, since it uses less digits than its factorization.

3689864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 461239 (or 461235 counting only the distinct ones).

The product of its digits is 248832, while the sum is 44.

The square root of 3689864 is about 1920.9018715176. The cubic root of 3689864 is about 154.5266726048.

Subtracting 3689864 from its reverse (4689863), we obtain a palindrome (999999).

The spelling of 3689864 in words is "three million, six hundred eighty-nine thousand, eight hundred sixty-four".