3831440 has 40 divisors (see below), whose sum is σ = 9106560. Its totient is φ = 1498496.

The previous prime is 3831439. The next prime is 3831449. The reversal of 3831440 is 441383.

3831440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not an unprimeable number, because it can be changed into a prime (3831449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3251 + ... + 4269.

It is an arithmetic number, because the mean of its divisors is an integer number (227664).

Almost surely, 2^3831440 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 3831440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4553280).

3831440 is an abundant number, since it is smaller than the sum of its proper divisors (5275120).

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

3831440 is a wasteful number, since it uses less digits than its factorization.

3831440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1079 (or 1073 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 3831440 is about 1957.4064473175. The cubic root of 3831440 is about 156.4782605126.

The spelling of 3831440 in words is "three million, eight hundred thirty-one thousand, four hundred forty".