28628714473 has 4 divisors (see below), whose sum is σ = 28633316740. Its totient is φ = 28624112208.

The previous prime is 28628714449. The next prime is 28628714497. The reversal of 28628714473 is 37441782682.

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

It is an interprime number because it is at equal distance from previous prime (28628714449) and next prime (28628714497).

It can be written as a sum of positive squares in 2 ways, for example, as 20081157264 + 8547557209 = 141708^2 + 92453^2 .

It is a cyclic number.

It is not a de Polignac number, because 28628714473 - 2⁵ = 28628714441 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28628714473.

It is not an unprimeable number, because it can be changed into a prime (28628714573) 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, 2291790 + ... + 2304247.

It is an arithmetic number, because the mean of its divisors is an integer number (7158329185).

Almost surely, 2^28628714473 is an apocalyptic number.

It is an amenable number.

28628714473 is a deficient number, since it is larger than the sum of its proper divisors (4602267).

28628714473 is an equidigital number, since it uses as much as digits as its factorization.

28628714473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4602266.

The product of its digits is 3612672, while the sum is 52.

The spelling of 28628714473 in words is "twenty-eight billion, six hundred twenty-eight million, seven hundred fourteen thousand, four hundred seventy-three".