28856871670 has 32 divisors (see below), whose sum is σ = 57593340576. Its totient is φ = 10321382400.

The previous prime is 28856871649. The next prime is 28856871691. The reversal of 28856871670 is 7617865882.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (28856871649) and next prime (28856871691).

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 2143579 + ... + 2156998.

It is an arithmetic number, because the mean of its divisors is an integer number (1799791893).

Almost surely, 2^28856871670 is an apocalyptic number.

28856871670 is a deficient number, since it is larger than the sum of its proper divisors (28736468906).

28856871670 is a wasteful number, since it uses less digits than its factorization.

28856871670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4300656.

The product of its (nonzero) digits is 9031680, while the sum is 58.

The spelling of 28856871670 in words is "twenty-eight billion, eight hundred fifty-six million, eight hundred seventy-one thousand, six hundred seventy".