28506077755250 has 48 divisors (see below), whose sum is σ = 56687048276040. Its totient is φ = 10731699833600.

The previous prime is 28506077755237. The next prime is 28506077755291. The reversal of 28506077755250 is 5255777060582.

It can be written as a sum of positive squares in 12 ways, for example, as 552535028929 + 27953542726321 = 743327^2 + 5287111^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28506077755250.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 197201645 + ... + 197346144.

Almost surely, 2^{28506077755250} is an apocalyptic number.

28506077755250 is a deficient number, since it is larger than the sum of its proper divisors (28180970520790).

28506077755250 is a wasteful number, since it uses less digits than its factorization.

28506077755250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394547840 (or 394547813 counting only the distinct ones).

The product of its (nonzero) digits is 41160000, while the sum is 59.

The spelling of 28506077755250 in words is "twenty-eight trillion, five hundred six billion, seventy-seven million, seven hundred fifty-five thousand, two hundred fifty".