28775666370 has 32 divisors (see below), whose sum is σ = 75339927360. Its totient is φ = 6975919040.

The previous prime is 28775666357. The next prime is 28775666407. The reversal of 28775666370 is 7366657782.

It is a self number, because there is not a number n which added to its sum of digits gives 28775666370.

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, 43599165 + ... + 43599824.

It is an arithmetic number, because the mean of its divisors is an integer number (2354372730).

Almost surely, 2^28775666370 is an apocalyptic number.

28775666370 is an abundant number, since it is smaller than the sum of its proper divisors (46564260990).

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

28775666370 is a wasteful number, since it uses less digits than its factorization.

28775666370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87199010.

The product of its (nonzero) digits is 17781120, while the sum is 57.

It can be divided in two parts, 287 and 75666370, that added together give a palindrome (75666657).

The spelling of 28775666370 in words is "twenty-eight billion, seven hundred seventy-five million, six hundred sixty-six thousand, three hundred seventy".