28758599489 has 4 divisors (see below), whose sum is σ = 28759100160. Its totient is φ = 28758098820.

The previous prime is 28758599473. The next prime is 28758599497. The reversal of 28758599489 is 98499585782.

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.

It is a cyclic number.

It is not a de Polignac number, because 28758599489 - 2⁴ = 28758599473 is a prime.

It is a super-2 number, since 2×28758599489² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28758599449) 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, 151049 + ... + 283430.

It is an arithmetic number, because the mean of its divisors is an integer number (7189775040).

Almost surely, 2^28758599489 is an apocalyptic number.

It is an amenable number.

28758599489 is a deficient number, since it is larger than the sum of its proper divisors (500671).

28758599489 is an equidigital number, since it uses as much as digits as its factorization.

28758599489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500670.

The product of its digits is 522547200, while the sum is 74.

The spelling of 28758599489 in words is "twenty-eight billion, seven hundred fifty-eight million, five hundred ninety-nine thousand, four hundred eighty-nine".