28217007284 has 6 divisors (see below), whose sum is σ = 49379762754. Its totient is φ = 14108503640.

The previous prime is 28217007199. The next prime is 28217007289. The reversal of 28217007284 is 48270071282.

It can be written as a sum of positive squares in only one way, i.e., 28086408100 + 130599184 = 167590^2 + 11428^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28217007289) 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 as a sum of consecutive naturals, namely, 3527125907 + ... + 3527125914.

It is an arithmetic number, because the mean of its divisors is an integer number (8229960459).

Almost surely, 2^28217007284 is an apocalyptic number.

It is an amenable number.

28217007284 is a deficient number, since it is larger than the sum of its proper divisors (21162755470).

28217007284 is a wasteful number, since it uses less digits than its factorization.

28217007284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7054251825 (or 7054251823 counting only the distinct ones).

The product of its (nonzero) digits is 100352, while the sum is 41.

The spelling of 28217007284 in words is "twenty-eight billion, two hundred seventeen million, seven thousand, two hundred eighty-four".