2772955878 has 128 divisors (see below), whose sum is σ = 7153090560. Its totient is φ = 695761920.

The previous prime is 2772955793. The next prime is 2772955879. The reversal of 2772955878 is 8785592772.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2772955879) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1926283 + ... + 1927721.

It is an arithmetic number, because the mean of its divisors is an integer number (55883520).

Almost surely, 2^2772955878 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2772955878, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3576545280).

2772955878 is an abundant number, since it is smaller than the sum of its proper divisors (4380134682).

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

2772955878 is a wasteful number, since it uses less digits than its factorization.

2772955878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1602.

The product of its digits is 19756800, while the sum is 60.

The square root of 2772955878 is about 52658.8632425729. The cubic root of 2772955878 is about 1404.9072481756.

The spelling of 2772955878 in words is "two billion, seven hundred seventy-two million, nine hundred fifty-five thousand, eight hundred seventy-eight".