28775266770 has 64 divisors (see below), whose sum is σ = 69358622976. Its totient is φ = 7640371200.

The previous prime is 28775266753. The next prime is 28775266771. The reversal of 28775266770 is 7766257782.

It is a happy number.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 28775266770.

It is not an unprimeable number, because it can be changed into a prime (28775266771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7781562 + ... + 7785258.

It is an arithmetic number, because the mean of its divisors is an integer number (1083728484).

Almost surely, 2^28775266770 is an apocalyptic number.

28775266770 is an abundant number, since it is smaller than the sum of its proper divisors (40583356206).

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

28775266770 is a wasteful number, since it uses less digits than its factorization.

28775266770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4755.

The product of its (nonzero) digits is 13829760, while the sum is 57.

The spelling of 28775266770 in words is "twenty-eight billion, seven hundred seventy-five million, two hundred sixty-six thousand, seven hundred seventy".