28662220033 has 4 divisors (see below), whose sum is σ = 29586807808. Its totient is φ = 27737632260.

The previous prime is 28662220021. The next prime is 28662220039. The reversal of 28662220033 is 33002226682.

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, and also an emirpimes, since its reverse is a distinct semiprime: 33002226682 = 2 ⋅16501113341.

It is a cyclic number.

It is not a de Polignac number, because 28662220033 - 2¹³ = 28662211841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28662220039) 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, 462293841 + ... + 462293902.

It is an arithmetic number, because the mean of its divisors is an integer number (7396701952).

Almost surely, 2^28662220033 is an apocalyptic number.

It is an amenable number.

28662220033 is a deficient number, since it is larger than the sum of its proper divisors (924587775).

28662220033 is an equidigital number, since it uses as much as digits as its factorization.

28662220033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 924587774.

The product of its (nonzero) digits is 41472, while the sum is 34.

The spelling of 28662220033 in words is "twenty-eight billion, six hundred sixty-two million, two hundred twenty thousand, thirty-three".