3865284 has 36 divisors (see below), whose sum is σ = 10286640. Its totient is φ = 1220400.

The previous prime is 3865283. The next prime is 3865289. The reversal of 3865284 is 4825683.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a d-powerful number, because it can be written as 3⁷ + 8 + 6⁸ + 5⁷ + 2¹³ + 8⁷ + 4 .

It is a zygodrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (3865283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2142 + ... + 3509.

It is an arithmetic number, because the mean of its divisors is an integer number (285740).

Almost surely, 2^3865284 is an apocalyptic number.

It is an amenable number.

3865284 is an abundant number, since it is smaller than the sum of its proper divisors (6421356).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3865284 is a wasteful number, since it uses less digits than its factorization.

3865284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5680 (or 5675 counting only the distinct ones).

The product of its digits is 46080, while the sum is 36.

The square root of 3865284 is about 1966.0325531384. The cubic root of 3865284 is about 156.9376468150.

The spelling of 3865284 in words is "three million, eight hundred sixty-five thousand, two hundred eighty-four".