2778895056 has 120 divisors (see below), whose sum is σ = 8620472064. Its totient is φ = 768337920.

The previous prime is 2778895033. The next prime is 2778895079. The reversal of 2778895056 is 6505988772.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2778895033) and next prime (2778895079).

It is a super-2 number, since 2×2778895056² = 15444515464522486272, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2778894987 and 2778895005.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 53856 + ... + 91968.

Almost surely, 2^2778895056 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 2778895056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4310236032).

2778895056 is an abundant number, since it is smaller than the sum of its proper divisors (5841577008).

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

2778895056 is a wasteful number, since it uses less digits than its factorization.

2778895056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38169 (or 38156 counting only the distinct ones).

The product of its (nonzero) digits is 8467200, while the sum is 57.

The square root of 2778895056 is about 52715.2260357480. The cubic root of 2778895056 is about 1405.9095533629.

The spelling of 2778895056 in words is "two billion, seven hundred seventy-eight million, eight hundred ninety-five thousand, fifty-six".