3867440 has 40 divisors (see below), whose sum is σ = 9307440. Its totient is φ = 1492736.

The previous prime is 3867433. The next prime is 3867443. The reversal of 3867440 is 447683.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 3867397 and 3867406.

It is not an unprimeable number, because it can be changed into a prime (3867443) 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, 1487 + ... + 3153.

It is an arithmetic number, because the mean of its divisors is an integer number (232686).

Almost surely, 2^3867440 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 3867440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4653720).

3867440 is an abundant number, since it is smaller than the sum of its proper divisors (5440000).

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

3867440 is a wasteful number, since it uses less digits than its factorization.

3867440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1709 (or 1703 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 3867440 is about 1966.5807890855. The cubic root of 3867440 is about 156.9668205813.

The spelling of 3867440 in words is "three million, eight hundred sixty-seven thousand, four hundred forty".