2028774561 has 32 divisors (see below), whose sum is σ = 2995453440. Its totient is φ = 1211107200.

The previous prime is 2028774551. The next prime is 2028774569. The reversal of 2028774561 is 1654778202.

It is not a de Polignac number, because 2028774561 - 2¹¹ = 2028772513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2028774569) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1119346 + ... + 1121156.

It is an arithmetic number, because the mean of its divisors is an integer number (93607920).

Almost surely, 2^2028774561 is an apocalyptic number.

It is an amenable number.

2028774561 is a deficient number, since it is larger than the sum of its proper divisors (966678879).

2028774561 is a wasteful number, since it uses less digits than its factorization.

2028774561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2317.

The product of its (nonzero) digits is 188160, while the sum is 42.

The square root of 2028774561 is about 45041.9200412238. The cubic root of 2028774561 is about 1265.9345811727.

The spelling of 2028774561 in words is "two billion, twenty-eight million, seven hundred seventy-four thousand, five hundred sixty-one".