2778228772 has 24 divisors (see below), whose sum is σ = 5323631040. Its totient is φ = 1258131360.

The previous prime is 2778228769. The next prime is 2778228779.

2778228772 is nontrivially palindromic in base 10.

It is not an unprimeable number, because it can be changed into a prime (2778228779) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105528 + ... + 129199.

It is an arithmetic number, because the mean of its divisors is an integer number (221817960).

Almost surely, 2^2778228772 is an apocalyptic number.

2778228772 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

2778228772 is a deficient number, since it is larger than the sum of its proper divisors (2545402268).

2778228772 is a wasteful number, since it uses less digits than its factorization.

2778228772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235011 (or 235009 counting only the distinct ones).

The product of its digits is 2458624, while the sum is 52.

The square root of 2778228772 is about 52708.9060026861. The cubic root of 2778228772 is about 1405.7971813712.

The spelling of 2778228772 in words is "two billion, seven hundred seventy-eight million, two hundred twenty-eight thousand, seven hundred seventy-two".