28696971850 has 24 divisors (see below), whose sum is σ = 53684917740. Its totient is φ = 11412433920.

The previous prime is 28696971817. The next prime is 28696971851. The reversal of 28696971850 is 5817969682.

It can be written as a sum of positive squares in 6 ways, for example, as 24421250529 + 4275721321 = 156273^2 + 65389^2 .

It is not an unprimeable number, because it can be changed into a prime (28696971851) 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 11 ways as a sum of consecutive naturals, for example, 1650135 + ... + 1667434.

Almost surely, 2^28696971850 is an apocalyptic number.

28696971850 is a deficient number, since it is larger than the sum of its proper divisors (24987945890).

28696971850 is a wasteful number, since it uses less digits than its factorization.

28696971850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3317754 (or 3317749 counting only the distinct ones).

The product of its (nonzero) digits is 13063680, while the sum is 61.

The spelling of 28696971850 in words is "twenty-eight billion, six hundred ninety-six million, nine hundred seventy-one thousand, eight hundred fifty".