2776231878 has 64 divisors (see below), whose sum is σ = 6624242688. Its totient is φ = 759093120.

The previous prime is 2776231823. The next prime is 2776231879. The reversal of 2776231878 is 8781326772.

It is a happy number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2776231878.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2776231879) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 80151 + ... + 109437.

It is an arithmetic number, because the mean of its divisors is an integer number (103503792).

Almost surely, 2^2776231878 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2776231878, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3312121344).

2776231878 is an abundant number, since it is smaller than the sum of its proper divisors (3848010810).

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

2776231878 is a wasteful number, since it uses less digits than its factorization.

2776231878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29397.

The product of its digits is 1580544, while the sum is 51.

The square root of 2776231878 is about 52689.9599354564. The cubic root of 2776231878 is about 1405.4602879719.

The spelling of 2776231878 in words is "two billion, seven hundred seventy-six million, two hundred thirty-one thousand, eight hundred seventy-eight".