3861284 has 24 divisors (see below), whose sum is σ = 7768320. Its totient is φ = 1645056.

The previous prime is 3861269. The next prime is 3861289. The reversal of 3861284 is 4821683.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 3861284.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3861289) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6404 + ... + 6980.

It is an arithmetic number, because the mean of its divisors is an integer number (323680).

Almost surely, 2^3861284 is an apocalyptic number.

It is an amenable number.

3861284 is an abundant number, since it is smaller than the sum of its proper divisors (3907036).

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

3861284 is a wasteful number, since it uses less digits than its factorization.

3861284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 827 (or 825 counting only the distinct ones).

The product of its digits is 9216, while the sum is 32.

The square root of 3861284 is about 1965.0150126653. The cubic root of 3861284 is about 156.8834923420.

It can be divided in two parts, 3 and 861284, that multiplied together give a palindrome (2583852).

The spelling of 3861284 in words is "three million, eight hundred sixty-one thousand, two hundred eighty-four".