28872771870 has 16 divisors (see below), whose sum is σ = 69294652560. Its totient is φ = 7699405824.

The previous prime is 28872771859. The next prime is 28872771871. The reversal of 28872771870 is 7817727882.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 28872771870.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28872771871) 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 in 7 ways as a sum of consecutive naturals, for example, 481212835 + ... + 481212894.

It is an arithmetic number, because the mean of its divisors is an integer number (4330915785).

Almost surely, 2^28872771870 is an apocalyptic number.

28872771870 is an abundant number, since it is smaller than the sum of its proper divisors (40421880690).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28872771870 is a wasteful number, since it uses less digits than its factorization.

28872771870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 962425739.

The product of its (nonzero) digits is 4917248, while the sum is 57.

The spelling of 28872771870 in words is "twenty-eight billion, eight hundred seventy-two million, seven hundred seventy-one thousand, eight hundred seventy".