28234632449 has 4 divisors (see below), whose sum is σ = 28275493680. Its totient is φ = 28193771220.

The previous prime is 28234632443. The next prime is 28234632479. The reversal of 28234632449 is 94423643282.

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: 94423643282 = 2 ⋅47211821641.

It is a cyclic number.

It is not a de Polignac number, because 28234632449 - 2⁸ = 28234632193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28234632443) 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, 20429579 + ... + 20430960.

It is an arithmetic number, because the mean of its divisors is an integer number (7068873420).

Almost surely, 2^28234632449 is an apocalyptic number.

It is an amenable number.

28234632449 is a deficient number, since it is larger than the sum of its proper divisors (40861231).

28234632449 is an equidigital number, since it uses as much as digits as its factorization.

28234632449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40861230.

The product of its digits is 1990656, while the sum is 47.

The spelling of 28234632449 in words is "twenty-eight billion, two hundred thirty-four million, six hundred thirty-two thousand, four hundred forty-nine".