28074494689 has 4 divisors (see below), whose sum is σ = 28078592256. Its totient is φ = 28070397124.

The previous prime is 28074494683. The next prime is 28074494713. The reversal of 28074494689 is 98649447082.

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 28074494689 - 2³ = 28074494681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28074494681) 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, 2038489 + ... + 2052214.

It is an arithmetic number, because the mean of its divisors is an integer number (7019648064).

Almost surely, 2^28074494689 is an apocalyptic number.

It is an amenable number.

28074494689 is a deficient number, since it is larger than the sum of its proper divisors (4097567).

28074494689 is an equidigital number, since it uses as much as digits as its factorization.

28074494689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4097566.

The product of its (nonzero) digits is 27869184, while the sum is 61.

The spelling of 28074494689 in words is "twenty-eight billion, seventy-four million, four hundred ninety-four thousand, six hundred eighty-nine".