2748787778 has 16 divisors (see below), whose sum is σ = 4554956160. Its totient is φ = 1233632400.

The previous prime is 2748787777. The next prime is 2748787781. The reversal of 2748787778 is 8777878472.

It is not an unprimeable number, because it can be changed into a prime (2748787777) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 789053 + ... + 792528.

It is an arithmetic number, because the mean of its divisors is an integer number (284684760).

Almost surely, 2^2748787778 is an apocalyptic number.

2748787778 is a deficient number, since it is larger than the sum of its proper divisors (1806168382).

2748787778 is a wasteful number, since it uses less digits than its factorization.

2748787778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1581673.

The product of its digits is 68841472, while the sum is 65.

The square root of 2748787778 is about 52428.8830512343. The cubic root of 2748787778 is about 1400.8137748465.

The spelling of 2748787778 in words is "two billion, seven hundred forty-eight million, seven hundred eighty-seven thousand, seven hundred seventy-eight".