2772778988 has 12 divisors (see below), whose sum is σ = 5545558032. Its totient is φ = 1188333840.

The previous prime is 2772778937. The next prime is 2772779011. The reversal of 2772778988 is 8898772772.

2772778988 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49513883 + ... + 49513938.

It is an arithmetic number, because the mean of its divisors is an integer number (462129836).

Almost surely, 2^2772778988 is an apocalyptic number.

2772778988 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

2772778988 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2772778988 is a wasteful number, since it uses less digits than its factorization.

2772778988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99027832 (or 99027830 counting only the distinct ones).

The product of its digits is 44255232, while the sum is 65.

The square root of 2772778988 is about 52657.1836314856. The cubic root of 2772778988 is about 1404.8773739982.

The spelling of 2772778988 in words is "two billion, seven hundred seventy-two million, seven hundred seventy-eight thousand, nine hundred eighty-eight".