2788820 has 48 divisors (see below), whose sum is σ = 6350400. Its totient is φ = 1025280.

The previous prime is 2788817. The next prime is 2788823. The reversal of 2788820 is 288872.

2788820 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2788817) and next prime (2788823).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2788823) 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 15 ways as a sum of consecutive naturals, for example, 15491 + ... + 15669.

It is an arithmetic number, because the mean of its divisors is an integer number (132300).

2^2788820 is an apocalyptic number.

2788820 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 2788820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3175200).

2788820 is an abundant number, since it is smaller than the sum of its proper divisors (3561580).

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

2788820 is a wasteful number, since it uses less digits than its factorization.

2788820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248 (or 246 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 35.

The square root of 2788820 is about 1669.9760477324. The cubic root of 2788820 is about 140.7581320289.

The spelling of 2788820 in words is "two million, seven hundred eighty-eight thousand, eight hundred twenty".