28078747467 has 4 divisors (see below), whose sum is σ = 37438329960. Its totient is φ = 18719164976.

The previous prime is 28078747441. The next prime is 28078747471. The reversal of 28078747467 is 76474787082.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28078747467 - 2⁸ = 28078747211 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28078747467.

It is not an unprimeable number, because it can be changed into a prime (28078747427) 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, 4679791242 + ... + 4679791247.

It is an arithmetic number, because the mean of its divisors is an integer number (9359582490).

Almost surely, 2^28078747467 is an apocalyptic number.

28078747467 is a deficient number, since it is larger than the sum of its proper divisors (9359582493).

28078747467 is an equidigital number, since it uses as much as digits as its factorization.

28078747467 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9359582492.

The product of its (nonzero) digits is 29503488, while the sum is 60.

The spelling of 28078747467 in words is "twenty-eight billion, seventy-eight million, seven hundred forty-seven thousand, four hundred sixty-seven".