28757077187 has 4 divisors (see below), whose sum is σ = 28775244960. Its totient is φ = 28738909416.

The previous prime is 28757077177. The next prime is 28757077301. The reversal of 28757077187 is 78177075782.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28757077187 - 2⁴ = 28757077171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28757077157) 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, 9081512 + ... + 9084677.

It is an arithmetic number, because the mean of its divisors is an integer number (7193811240).

Almost surely, 2^28757077187 is an apocalyptic number.

28757077187 is a deficient number, since it is larger than the sum of its proper divisors (18167773).

28757077187 is a wasteful number, since it uses less digits than its factorization.

28757077187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18167772.

The product of its (nonzero) digits is 10756480, while the sum is 59.

The spelling of 28757077187 in words is "twenty-eight billion, seven hundred fifty-seven million, seventy-seven thousand, one hundred eighty-seven".