3869784 has 48 divisors (see below), whose sum is σ = 10642320. Its totient is φ = 1270080.

The previous prime is 3869759. The next prime is 3869791. The reversal of 3869784 is 4879683.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4734 + ... + 5490.

It is an arithmetic number, because the mean of its divisors is an integer number (221715).

Almost surely, 2^3869784 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 3869784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5321160).

3869784 is an abundant number, since it is smaller than the sum of its proper divisors (6772536).

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

3869784 is a wasteful number, since it uses less digits than its factorization.

3869784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 840 (or 833 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 3869784 is about 1967.1766570392. The cubic root of 3869784 is about 156.9985259575.

It can be divided in two parts, 38697 and 84, that added together give a triangular number (38781 = T₂₇₈).

The spelling of 3869784 in words is "three million, eight hundred sixty-nine thousand, seven hundred eighty-four".