28011309027693 has 4 divisors (see below), whose sum is σ = 37348412036928. Its totient is φ = 18674206018460.

The previous prime is 28011309027659. The next prime is 28011309027739. The reversal of 28011309027693 is 39672090311082.

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 28011309027693 - 2¹⁰ = 28011309026669 is a prime.

It is a super-2 number, since 2×28011309027693² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28011309027613) 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, 4668551504613 + ... + 4668551504618.

It is an arithmetic number, because the mean of its divisors is an integer number (9337103009232).

Almost surely, 2^{28011309027693} is an apocalyptic number.

It is an amenable number.

28011309027693 is a deficient number, since it is larger than the sum of its proper divisors (9337103009235).

28011309027693 is an equidigital number, since it uses as much as digits as its factorization.

28011309027693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9337103009234.

The product of its (nonzero) digits is 979776, while the sum is 51.

The spelling of 28011309027693 in words is "twenty-eight trillion, eleven billion, three hundred nine million, twenty-seven thousand, six hundred ninety-three".