2808440 has 32 divisors (see below), whose sum is σ = 6428160. Its totient is φ = 1104000.

The previous prime is 2808437. The next prime is 2808469. The reversal of 2808440 is 448082.

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors.

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, 1865 + ... + 3015.

It is an arithmetic number, because the mean of its divisors is an integer number (200880).

2^2808440 is an apocalyptic number.

2808440 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 2808440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3214080).

2808440 is an abundant number, since it is smaller than the sum of its proper divisors (3619720).

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

2808440 is a wasteful number, since it uses less digits than its factorization.

2808440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1223 (or 1219 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 26.

The square root of 2808440 is about 1675.8400878365. The cubic root of 2808440 is about 141.0874497335.

The spelling of 2808440 in words is "two million, eight hundred eight thousand, four hundred forty".