28664264289 has 4 divisors (see below), whose sum is σ = 38219019056. Its totient is φ = 19109509524.

The previous prime is 28664264219. The next prime is 28664264309. The reversal of 28664264289 is 98246246682.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 28664264289 - 2¹³ = 28664256097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28664264219) 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, 4777377379 + ... + 4777377384.

It is an arithmetic number, because the mean of its divisors is an integer number (9554754764).

Almost surely, 2^28664264289 is an apocalyptic number.

It is an amenable number.

28664264289 is a deficient number, since it is larger than the sum of its proper divisors (9554754767).

28664264289 is an equidigital number, since it uses as much as digits as its factorization.

28664264289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9554754766.

The product of its digits is 15925248, while the sum is 57.

The spelling of 28664264289 in words is "twenty-eight billion, six hundred sixty-four million, two hundred sixty-four thousand, two hundred eighty-nine".