28072209002 has 4 divisors (see below), whose sum is σ = 42108313506. Its totient is φ = 14036104500.

The previous prime is 28072209001. The next prime is 28072209041. The reversal of 28072209002 is 20090227082.

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

It can be written as a sum of positive squares in only one way, i.e., 19510223041 + 8561985961 = 139679^2 + 92531^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28072209002.

It is not an unprimeable number, because it can be changed into a prime (28072209001) 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, 7018052249 + ... + 7018052252.

Almost surely, 2^28072209002 is an apocalyptic number.

28072209002 is a deficient number, since it is larger than the sum of its proper divisors (14036104504).

28072209002 is a wasteful number, since it uses less digits than its factorization.

28072209002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14036104503.

The product of its (nonzero) digits is 8064, while the sum is 32.

The spelling of 28072209002 in words is "twenty-eight billion, seventy-two million, two hundred nine thousand, two".