2028665811 has 8 divisors (see below), whose sum is σ = 2863998864. Its totient is φ = 1272888320.

The previous prime is 2028665809. The next prime is 2028665813. The reversal of 2028665811 is 1185668202.

It is an interprime number because it is at equal distance from previous prime (2028665809) and next prime (2028665813).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2028665811 - 2¹ = 2028665809 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2028665811.

It is not an unprimeable number, because it can be changed into a prime (2028665813) 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, 19888830 + ... + 19888931.

It is an arithmetic number, because the mean of its divisors is an integer number (357999858).

Almost surely, 2^2028665811 is an apocalyptic number.

2028665811 is a deficient number, since it is larger than the sum of its proper divisors (835333053).

2028665811 is a wasteful number, since it uses less digits than its factorization.

2028665811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39777781.

The product of its (nonzero) digits is 46080, while the sum is 39.

The square root of 2028665811 is about 45040.7128162954. The cubic root of 2028665811 is about 1265.9119611392.

The spelling of 2028665811 in words is "two billion, twenty-eight million, six hundred sixty-five thousand, eight hundred eleven".