28212426193 has 4 divisors (see below), whose sum is σ = 32242772800. Its totient is φ = 24182079588.

The previous prime is 28212426173. The next prime is 28212426197. The reversal of 28212426193 is 39162421282.

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 28212426193 - 2⁵ = 28212426161 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28212426197) 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, 2015173293 + ... + 2015173306.

It is an arithmetic number, because the mean of its divisors is an integer number (8060693200).

Almost surely, 2^28212426193 is an apocalyptic number.

It is an amenable number.

28212426193 is a deficient number, since it is larger than the sum of its proper divisors (4030346607).

28212426193 is an equidigital number, since it uses as much as digits as its factorization.

28212426193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4030346606.

The product of its digits is 82944, while the sum is 40.

The spelling of 28212426193 in words is "twenty-eight billion, two hundred twelve million, four hundred twenty-six thousand, one hundred ninety-three".