28888574449 has 4 divisors (see below), whose sum is σ = 33015513664. Its totient is φ = 24761635236.

The previous prime is 28888574443. The next prime is 28888574483. The reversal of 28888574449 is 94447588882.

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: 94447588882 = 2 ⋅47223794441.

It is a cyclic number.

It is not a de Polignac number, because 28888574449 - 2⁹ = 28888573937 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28888574443) 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, 2063469597 + ... + 2063469610.

It is an arithmetic number, because the mean of its divisors is an integer number (8253878416).

Almost surely, 2^28888574449 is an apocalyptic number.

It is an amenable number.

28888574449 is a deficient number, since it is larger than the sum of its proper divisors (4126939215).

28888574449 is an equidigital number, since it uses as much as digits as its factorization.

28888574449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4126939214.

The product of its digits is 165150720, while the sum is 67.

The spelling of 28888574449 in words is "twenty-eight billion, eight hundred eighty-eight million, five hundred seventy-four thousand, four hundred forty-nine".