2779706772 has 18 divisors (see below), whose sum is σ = 7026481098. Its totient is φ = 926568912.

The previous prime is 2779706767. The next prime is 2779706777. The reversal of 2779706772 is 2776079772.

It is an interprime number because it is at equal distance from previous prime (2779706767) and next prime (2779706777).

It can be written as a sum of positive squares in only one way, i.e., 2076078096 + 703628676 = 45564^2 + 26526^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2779706777) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 38607003 + ... + 38607074.

It is an arithmetic number, because the mean of its divisors is an integer number (390360061).

Almost surely, 2^2779706772 is an apocalyptic number.

It is an amenable number.

2779706772 is an abundant number, since it is smaller than the sum of its proper divisors (4246774326).

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

2779706772 is a wasteful number, since it uses less digits than its factorization.

2779706772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77214087 (or 77214082 counting only the distinct ones).

The product of its (nonzero) digits is 3630312, while the sum is 54.

The square root of 2779706772 is about 52722.9245395208. The cubic root of 2779706772 is about 1406.0464288906.

The spelling of 2779706772 in words is "two billion, seven hundred seventy-nine million, seven hundred six thousand, seven hundred seventy-two".