3881280 has 112 divisors (see below), whose sum is σ = 13313664. Its totient is φ = 952320.

The previous prime is 3881249. The next prime is 3881291. The reversal of 3881280 is 821883.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

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, 12325 + ... + 12635.

It is an arithmetic number, because the mean of its divisors is an integer number (118872).

Almost surely, 2^3881280 is an apocalyptic number.

3881280 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3881280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6656832).

3881280 is an abundant number, since it is smaller than the sum of its proper divisors (9432384).

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

3881280 is a wasteful number, since it uses less digits than its factorization.

3881280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344 (or 334 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 30.

The square root of 3881280 is about 1970.0964443397. The cubic root of 3881280 is about 157.1538378789.

It can be divided in two parts, 38 and 81280, that added together give a palindrome (81318).

The spelling of 3881280 in words is "three million, eight hundred eighty-one thousand, two hundred eighty".