28321063508 has 6 divisors (see below), whose sum is σ = 49561861146. Its totient is φ = 14160531752.

The previous prime is 28321063499. The next prime is 28321063541. The reversal of 28321063508 is 80536012382.

It can be written as a sum of positive squares in only one way, i.e., 28206530704 + 114532804 = 167948^2 + 10702^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3540132935 + ... + 3540132942.

It is an arithmetic number, because the mean of its divisors is an integer number (8260310191).

Almost surely, 2^28321063508 is an apocalyptic number.

It is an amenable number.

28321063508 is a deficient number, since it is larger than the sum of its proper divisors (21240797638).

28321063508 is a wasteful number, since it uses less digits than its factorization.

28321063508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7080265881 (or 7080265879 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 38.

The spelling of 28321063508 in words is "twenty-eight billion, three hundred twenty-one million, sixty-three thousand, five hundred eight".