28240310171 has 4 divisors (see below), whose sum is σ = 29214114000. Its totient is φ = 27266506344.

The previous prime is 28240310149. The next prime is 28240310177. The reversal of 28240310171 is 17101304282.

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 28240310171 - 2⁶ = 28240310107 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 973803799 = 28240310171 / (2 + 8 + 2 + 4 + 0 + 3 + 1 + 0 + 1 + 7 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28240310177) 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, 486901871 + ... + 486901928.

It is an arithmetic number, because the mean of its divisors is an integer number (7303528500).

Almost surely, 2^28240310171 is an apocalyptic number.

28240310171 is a deficient number, since it is larger than the sum of its proper divisors (973803829).

28240310171 is an equidigital number, since it uses as much as digits as its factorization.

28240310171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 973803828.

The product of its (nonzero) digits is 2688, while the sum is 29.

The spelling of 28240310171 in words is "twenty-eight billion, two hundred forty million, three hundred ten thousand, one hundred seventy-one".