2778796812 has 96 divisors (see below), whose sum is σ = 7672299264. Its totient is φ = 773171200.

The previous prime is 2778796799. The next prime is 2778796843. The reversal of 2778796812 is 2186978772.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 76903 + ... + 107105.

It is an arithmetic number, because the mean of its divisors is an integer number (79919784).

Almost surely, 2^2778796812 is an apocalyptic number.

2778796812 is a gapful number since it is divisible by the number (22) 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 2778796812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3836149632).

2778796812 is an abundant number, since it is smaller than the sum of its proper divisors (4893502452).

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

2778796812 is a wasteful number, since it uses less digits than its factorization.

2778796812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30279 (or 30277 counting only the distinct ones).

The product of its digits is 4741632, while the sum is 57.

The square root of 2778796812 is about 52714.2941904755. The cubic root of 2778796812 is about 1405.8929851702.

The spelling of 2778796812 in words is "two billion, seven hundred seventy-eight million, seven hundred ninety-six thousand, eight hundred twelve".