28547855993 has 4 divisors (see below), whose sum is σ = 28586487120. Its totient is φ = 28509224868.

The previous prime is 28547855957. The next prime is 28547856017. The reversal of 28547855993 is 39955874582.

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 28547855993 - 2¹⁴ = 28547839609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28547855933) 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, 19314455 + ... + 19315932.

It is an arithmetic number, because the mean of its divisors is an integer number (7146621780).

Almost surely, 2^28547855993 is an apocalyptic number.

It is an amenable number.

28547855993 is a deficient number, since it is larger than the sum of its proper divisors (38631127).

28547855993 is an equidigital number, since it uses as much as digits as its factorization.

28547855993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38631126.

The product of its digits is 108864000, while the sum is 65.

The spelling of 28547855993 in words is "twenty-eight billion, five hundred forty-seven million, eight hundred fifty-five thousand, nine hundred ninety-three".