28434065771 has 4 divisors (see below), whose sum is σ = 28970557632. Its totient is φ = 27897573912.

The previous prime is 28434065741. The next prime is 28434065809. The reversal of 28434065771 is 17756043482.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28434065771 - 2¹⁴ = 28434049387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28434065711) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 268245851 + ... + 268245956.

It is an arithmetic number, because the mean of its divisors is an integer number (7242639408).

Almost surely, 2^28434065771 is an apocalyptic number.

28434065771 is a deficient number, since it is larger than the sum of its proper divisors (536491861).

28434065771 is an equidigital number, since it uses as much as digits as its factorization.

28434065771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 536491860.

The product of its (nonzero) digits is 1128960, while the sum is 47.

The spelling of 28434065771 in words is "twenty-eight billion, four hundred thirty-four million, sixty-five thousand, seven hundred seventy-one".