2788109225 has 36 divisors (see below), whose sum is σ = 4023734652. Its totient is φ = 1908403200.

The previous prime is 2788109209. The next prime is 2788109227. The reversal of 2788109225 is 5229018872.

It can be written as a sum of positive squares in 6 ways, for example, as 139051264 + 2649057961 = 11792^2 + 51469^2 .

It is not a de Polignac number, because 2788109225 - 2⁴ = 2788109209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2788109227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 24317 + ... + 78533.

It is an arithmetic number, because the mean of its divisors is an integer number (111770407).

Almost surely, 2^2788109225 is an apocalyptic number.

2788109225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2788109225 is a deficient number, since it is larger than the sum of its proper divisors (1235625427).

2788109225 is a wasteful number, since it uses less digits than its factorization.

2788109225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54266 (or 54250 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 44.

The square root of 2788109225 is about 52802.5494176181. The cubic root of 2788109225 is about 1407.4617286553.

The spelling of 2788109225 in words is "two billion, seven hundred eighty-eight million, one hundred nine thousand, two hundred twenty-five".