28329140449 has 4 divisors (see below), whose sum is σ = 28332769536. Its totient is φ = 28325511364.

The previous prime is 28329140447. The next prime is 28329140491. The reversal of 28329140449 is 94404192382.

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: 94404192382 = 2 ⋅47202096191.

It is a cyclic number.

It is not a de Polignac number, because 28329140449 - 2¹ = 28329140447 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28329140399 and 28329140408.

It is not an unprimeable number, because it can be changed into a prime (28329140447) 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, 1802809 + ... + 1818454.

It is an arithmetic number, because the mean of its divisors is an integer number (7083192384).

Almost surely, 2^28329140449 is an apocalyptic number.

It is an amenable number.

28329140449 is a deficient number, since it is larger than the sum of its proper divisors (3629087).

28329140449 is an equidigital number, since it uses as much as digits as its factorization.

28329140449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3629086.

The product of its (nonzero) digits is 497664, while the sum is 46.

The spelling of 28329140449 in words is "twenty-eight billion, three hundred twenty-nine million, one hundred forty thousand, four hundred forty-nine".