2281240 has 64 divisors (see below), whose sum is σ = 5715360. Its totient is φ = 814080.

The previous prime is 2281231. The next prime is 2281243. The reversal of 2281240 is 421822.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2281243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21267 + ... + 21373.

2^2281240 is an apocalyptic number.

2281240 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 2281240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2857680).

2281240 is an abundant number, since it is smaller than the sum of its proper divisors (3434120).

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

2281240 is a wasteful number, since it uses less digits than its factorization.

2281240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172 (or 168 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 2281240 is about 1510.3774362721. The cubic root of 2281240 is about 131.6407433520.

The spelling of 2281240 in words is "two million, two hundred eighty-one thousand, two hundred forty".