28072687851 has 72 divisors (see below), whose sum is σ = 45939441600. Its totient is φ = 16490073600.

The previous prime is 28072687807. The next prime is 28072687889. The reversal of 28072687851 is 15878627082.

It is not a de Polignac number, because 28072687851 - 2⁹ = 28072687339 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28072687351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 3922126 + ... + 3929276.

It is an arithmetic number, because the mean of its divisors is an integer number (638047800).

Almost surely, 2^28072687851 is an apocalyptic number.

28072687851 is a deficient number, since it is larger than the sum of its proper divisors (17866753749).

28072687851 is a wasteful number, since it uses less digits than its factorization.

28072687851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7301 (or 7285 counting only the distinct ones).

The product of its (nonzero) digits is 3010560, while the sum is 54.

The spelling of 28072687851 in words is "twenty-eight billion, seventy-two million, six hundred eighty-seven thousand, eight hundred fifty-one".