2778722944 has 64 divisors (see below), whose sum is σ = 6015225600. Its totient is φ = 1273743360.

The previous prime is 2778722929. The next prime is 2778722951. The reversal of 2778722944 is 4492278772.

2778722944 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (64).

It is a junction number, because it is equal to n+sod(n) for n = 2778722891 and 2778722900.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56964 + ... + 93820.

It is an arithmetic number, because the mean of its divisors is an integer number (93987900).

Almost surely, 2^2778722944 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2778722944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3007612800).

2778722944 is an abundant number, since it is smaller than the sum of its proper divisors (3236502656).

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

2778722944 is a wasteful number, since it uses less digits than its factorization.

2778722944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36921 (or 36909 counting only the distinct ones).

The product of its digits is 3161088, while the sum is 52.

The square root of 2778722944 is about 52713.5935409454. The cubic root of 2778722944 is about 1405.8805275695.

The spelling of 2778722944 in words is "two billion, seven hundred seventy-eight million, seven hundred twenty-two thousand, nine hundred forty-four".