28640707250 has 32 divisors (see below), whose sum is σ = 54756179712. Its totient is φ = 11212527600.

The previous prime is 28640707213. The next prime is 28640707261. The reversal of 28640707250 is 5270704682.

It is a super-2 number, since 2×28640707250² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 28640707198 and 28640707207.

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, 1207004 + ... + 1230503.

It is an arithmetic number, because the mean of its divisors is an integer number (1711130616).

Almost surely, 2^28640707250 is an apocalyptic number.

28640707250 is a deficient number, since it is larger than the sum of its proper divisors (26115472462).

28640707250 is a wasteful number, since it uses less digits than its factorization.

28640707250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2437571 (or 2437561 counting only the distinct ones).

The product of its (nonzero) digits is 188160, while the sum is 41.

The spelling of 28640707250 in words is "twenty-eight billion, six hundred forty million, seven hundred seven thousand, two hundred fifty".