2381280 has 144 divisors (see below), whose sum is σ = 8446032. Its totient is φ = 563200.

The previous prime is 2381273. The next prime is 2381287. The reversal of 2381280 is 821832.

It is an interprime number because it is at equal distance from previous prime (2381273) and next prime (2381287).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 2381280.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2381287) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 58060 + ... + 58100.

It is an arithmetic number, because the mean of its divisors is an integer number (58653).

2^2381280 is an apocalyptic number.

2381280 is a gapful number since it is divisible by the number (20) 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 2381280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4223016).

2381280 is an abundant number, since it is smaller than the sum of its proper divisors (6064752).

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

2381280 is a wasteful number, since it uses less digits than its factorization.

2381280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81 (or 62 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 2381280 is about 1543.1396566740. The cubic root of 2381280 is about 133.5375758665.

The spelling of 2381280 in words is "two million, three hundred eighty-one thousand, two hundred eighty".