2808140 has 12 divisors (see below), whose sum is σ = 5897136. Its totient is φ = 1123248.

The previous prime is 2808119. The next prime is 2808149. The reversal of 2808140 is 418082.

2808140 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (2808149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70184 + ... + 70223.

It is an arithmetic number, because the mean of its divisors is an integer number (491428).

2^2808140 is an apocalyptic number.

2808140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2808140 is an abundant number, since it is smaller than the sum of its proper divisors (3088996).

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

2808140 is a wasteful number, since it uses less digits than its factorization.

2808140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140416 (or 140414 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 23.

The square root of 2808140 is about 1675.7505780993. The cubic root of 2808140 is about 141.0824258600.

The spelling of 2808140 in words is "two million, eight hundred eight thousand, one hundred forty".