2280440 has 32 divisors (see below), whose sum is σ = 5244480. Its totient is φ = 892032.

The previous prime is 2280433. The next prime is 2280451. The reversal of 2280440 is 440822.

2280440 = 370² + 371² + ... + 385².

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1274 + ... + 2486.

It is an arithmetic number, because the mean of its divisors is an integer number (163890).

2^2280440 is an apocalyptic number.

2280440 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 2280440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2622240).

2280440 is an abundant number, since it is smaller than the sum of its proper divisors (2964040).

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

2280440 is a wasteful number, since it uses less digits than its factorization.

2280440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1271 (or 1267 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 2280440 is about 1510.1125785848. The cubic root of 2280440 is about 131.6253533436.

The spelling of 2280440 in words is "two million, two hundred eighty thousand, four hundred forty".