3871280 has 80 divisors (see below), whose sum is σ = 10665984. Its totient is φ = 1278720.

The previous prime is 3871271. The next prime is 3871303. The reversal of 3871280 is 821783.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17249 + ... + 17471.

Almost surely, 2^3871280 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 3871280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5332992).

3871280 is an abundant number, since it is smaller than the sum of its proper divisors (6794704).

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

3871280 is a wasteful number, since it uses less digits than its factorization.

3871280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274 (or 268 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 3871280 is about 1967.5568606777. The cubic root of 3871280 is about 157.0187544367.

The spelling of 3871280 in words is "three million, eight hundred seventy-one thousand, two hundred eighty".