3864509 has 8 divisors (see below), whose sum is σ = 4235328. Its totient is φ = 3496960.

The previous prime is 3864499. The next prime is 3864521. The reversal of 3864509 is 9054683.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3864509 is a prime.

It is a super-2 number, since 2×3864509² = 29868859622162, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3864599) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2144 + ... + 3510.

It is an arithmetic number, because the mean of its divisors is an integer number (529416).

Almost surely, 2^3864509 is an apocalyptic number.

It is an amenable number.

3864509 is a deficient number, since it is larger than the sum of its proper divisors (370819).

3864509 is a wasteful number, since it uses less digits than its factorization.

3864509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1635.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 3864509 is about 1965.8354458092. The cubic root of 3864509 is about 156.9271573050.

The spelling of 3864509 in words is "three million, eight hundred sixty-four thousand, five hundred nine".