2789808 has 120 divisors (see below), whose sum is σ = 9070848. Its totient is φ = 722304.

The previous prime is 2789791. The next prime is 2789821. The reversal of 2789808 is 8089872.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 2789808.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 121285 + ... + 121307.

2^2789808 is an apocalyptic number.

2789808 is a gapful number since it is divisible by the number (28) 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 2789808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4535424).

2789808 is an abundant number, since it is smaller than the sum of its proper divisors (6281040).

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

2789808 is a wasteful number, since it uses less digits than its factorization.

2789808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79 (or 54 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 42.

The square root of 2789808 is about 1670.2718341635. The cubic root of 2789808 is about 140.7747522739.

The spelling of 2789808 in words is "two million, seven hundred eighty-nine thousand, eight hundred eight".