28874707786 has 8 divisors (see below), whose sum is σ = 43379633124. Its totient is φ = 14414830080.

The previous prime is 28874707781. The next prime is 28874707789. The reversal of 28874707786 is 68770747882.

It can be written as a sum of positive squares in 2 ways, for example, as 20487628225 + 8387079561 = 143135^2 + 91581^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (28874707781) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11260305 + ... + 11262868.

Almost surely, 2^28874707786 is an apocalyptic number.

28874707786 is a deficient number, since it is larger than the sum of its proper divisors (14504925338).

28874707786 is a wasteful number, since it uses less digits than its factorization.

28874707786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22523816.

The product of its (nonzero) digits is 59006976, while the sum is 64.

The spelling of 28874707786 in words is "twenty-eight billion, eight hundred seventy-four million, seven hundred seven thousand, seven hundred eighty-six".