28694580693 has 4 divisors (see below), whose sum is σ = 38259440928. Its totient is φ = 19129720460.

The previous prime is 28694580689. The next prime is 28694580703. The reversal of 28694580693 is 39608549682.

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 28694580693 - 2² = 28694580689 is a prime.

It is a super-2 number, since 2×28694580693² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28694584693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4782430113 + ... + 4782430118.

It is an arithmetic number, because the mean of its divisors is an integer number (9564860232).

Almost surely, 2^28694580693 is an apocalyptic number.

It is an amenable number.

28694580693 is a deficient number, since it is larger than the sum of its proper divisors (9564860235).

28694580693 is an equidigital number, since it uses as much as digits as its factorization.

28694580693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9564860234.

The product of its (nonzero) digits is 22394880, while the sum is 60.

The spelling of 28694580693 in words is "twenty-eight billion, six hundred ninety-four million, five hundred eighty thousand, six hundred ninety-three".