2778027849 has 9 divisors (see below), whose sum is σ = 4012935303. Its totient is φ = 1851913152.

The previous prime is 2778027841. The next prime is 2778027853. The reversal of 2778027849 is 9487208772.

The square root of 2778027849 is 52707.

It is a perfect power (a square), and thus also a powerful number.

2778027849 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 53187849 + 2724840000 = 7293^2 + 52200^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 2778027849 - 2³ = 2778027841 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2778027795 and 2778027804.

It is not an unprimeable number, because it can be changed into a prime (2778027841) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 149337 + ... + 166905.

Almost surely, 2^2778027849 is an apocalyptic number.

2778027849 is the 52707-th square number.

2778027849 is the 26354-th centered octagonal number.

It is an amenable number.

2778027849 is a deficient number, since it is larger than the sum of its proper divisors (1234907454).

2778027849 is an frugal number, since it uses more digits than its factorization.

2778027849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35144 (or 17572 counting only the distinct ones).

The product of its (nonzero) digits is 3161088, while the sum is 54.

The cubic root of 2778027849 is about 1405.7632912179.

The spelling of 2778027849 in words is "two billion, seven hundred seventy-eight million, twenty-seven thousand, eight hundred forty-nine".