2288840 has 16 divisors (see below), whose sum is σ = 5149980. Its totient is φ = 915520.

The previous prime is 2288833. The next prime is 2288843. The reversal of 2288840 is 488822.

It can be written as a sum of positive squares in 2 ways, for example, as 2114116 + 174724 = 1454^2 + 418^2 .

It is a super-3 number, since 3×2288840³ = 35972246324133312000, which contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2288797 and 2288806.

It is not an unprimeable number, because it can be changed into a prime (2288843) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28571 + ... + 28650.

2^2288840 is an apocalyptic number.

2288840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2288840 is an abundant number, since it is smaller than the sum of its proper divisors (2861140).

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

2288840 is a wasteful number, since it uses less digits than its factorization.

2288840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57232 (or 57228 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 32.

The square root of 2288840 is about 1512.8912717046. The cubic root of 2288840 is about 131.7867692958.

The spelling of 2288840 in words is "two million, two hundred eighty-eight thousand, eight hundred forty".