28744474459 has 4 divisors (see below), whose sum is σ = 28826837200. Its totient is φ = 28662111720.

The previous prime is 28744474403. The next prime is 28744474471. The reversal of 28744474459 is 95447444782.

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 28744474459 - 2³¹ = 26596990811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28744477459) 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, 41180847 + ... + 41181544.

It is an arithmetic number, because the mean of its divisors is an integer number (7206709300).

Almost surely, 2^28744474459 is an apocalyptic number.

28744474459 is a deficient number, since it is larger than the sum of its proper divisors (82362741).

28744474459 is an equidigital number, since it uses as much as digits as its factorization.

28744474459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82362740.

The product of its digits is 36126720, while the sum is 58.

The spelling of 28744474459 in words is "twenty-eight billion, seven hundred forty-four million, four hundred seventy-four thousand, four hundred fifty-nine".