3831280 has 40 divisors (see below), whose sum is σ = 9030672. Its totient is φ = 1511424.

The previous prime is 3831253. The next prime is 3831287. The reversal of 3831280 is 821383.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3831287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6352 + ... + 6928.

Almost surely, 2^3831280 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 3831280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4515336).

3831280 is an abundant number, since it is smaller than the sum of its proper divisors (5199392).

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

3831280 is a wasteful number, since it uses less digits than its factorization.

3831280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 673 (or 667 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 3831280 is about 1957.3655764828. The cubic root of 3831280 is about 156.4760823177.

The spelling of 3831280 in words is "three million, eight hundred thirty-one thousand, two hundred eighty".