3865224 has 48 divisors (see below), whose sum is σ = 10629360. Its totient is φ = 1171280.

The previous prime is 3865187. The next prime is 3865229. The reversal of 3865224 is 4225683.

It is a d-powerful number, because it can be written as 3³ + 8⁷ + 6⁸ + 5⁷ + 2¹¹ + 2¹³ + 4³ .

Its product of digits (11520) is a multiple of the sum of its prime divisors (16).

It is a nialpdrome in base 11.

It is a zygodrome in base 11.

It is a junction number, because it is equal to n+sod(n) for n = 3865191 and 3865200.

It is not an unprimeable number, because it can be changed into a prime (3865229) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 351379 + ... + 351389.

It is an arithmetic number, because the mean of its divisors is an integer number (221445).

Almost surely, 2^3865224 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3865224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5314680).

3865224 is an abundant number, since it is smaller than the sum of its proper divisors (6764136).

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

3865224 is an frugal number, since it uses more digits than its factorization.

3865224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64 (or 16 counting only the distinct ones).

The product of its digits is 11520, while the sum is 30.

The square root of 3865224 is about 1966.0172939219. The cubic root of 3865224 is about 156.9368347740.

The spelling of 3865224 in words is "three million, eight hundred sixty-five thousand, two hundred twenty-four".