1928764065 has 16 divisors (see below), whose sum is σ = 3125088000. Its totient is φ = 1015652352.

The previous prime is 1928764021. The next prime is 1928764067. The reversal of 1928764065 is 5604678291.

It is not a de Polignac number, because 1928764065 - 2⁷ = 1928763937 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1928764067) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 812640 + ... + 815009.

It is an arithmetic number, because the mean of its divisors is an integer number (195318000).

Almost surely, 2^1928764065 is an apocalyptic number.

1928764065 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1928764065 is a deficient number, since it is larger than the sum of its proper divisors (1196323935).

1928764065 is a wasteful number, since it uses less digits than its factorization.

1928764065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1627736.

The product of its (nonzero) digits is 725760, while the sum is 48.

The square root of 1928764065 is about 43917.6964901394. The cubic root of 1928764065 is about 1244.7812425117.

The spelling of 1928764065 in words is "one billion, nine hundred twenty-eight million, seven hundred sixty-four thousand, sixty-five".