2772016820 has 12 divisors (see below), whose sum is σ = 5821235364. Its totient is φ = 1108806720.

The previous prime is 2772016789. The next prime is 2772016853. The reversal of 2772016820 is 286102772.

It can be written as a sum of positive squares in 2 ways, for example, as 1574026276 + 1197990544 = 39674^2 + 34612^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69300401 + ... + 69300440.

It is an arithmetic number, because the mean of its divisors is an integer number (485102947).

Almost surely, 2^2772016820 is an apocalyptic number.

2772016820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2772016820 is an abundant number, since it is smaller than the sum of its proper divisors (3049218544).

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

2772016820 is a wasteful number, since it uses less digits than its factorization.

2772016820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138600850 (or 138600848 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 35.

The square root of 2772016820 is about 52649.9460588518. The cubic root of 2772016820 is about 1404.7486402494.

The spelling of 2772016820 in words is "two billion, seven hundred seventy-two million, sixteen thousand, eight hundred twenty".