28072209005 has 8 divisors (see below), whose sum is σ = 33703736472. Its totient is φ = 22446376768.

The previous prime is 28072209001. The next prime is 28072209041. The reversal of 28072209005 is 50090227082.

It can be written as a sum of positive squares in 4 ways, for example, as 419512324 + 27652696681 = 20482^2 + 166291^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28072209005 - 2² = 28072209001 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28072209001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1412954 + ... + 1432683.

It is an arithmetic number, because the mean of its divisors is an integer number (4212967059).

Almost surely, 2^28072209005 is an apocalyptic number.

It is an amenable number.

28072209005 is a deficient number, since it is larger than the sum of its proper divisors (5631527467).

28072209005 is a wasteful number, since it uses less digits than its factorization.

28072209005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2847615.

The product of its (nonzero) digits is 20160, while the sum is 35.

The spelling of 28072209005 in words is "twenty-eight billion, seventy-two million, two hundred nine thousand, five".