28135070787 has 4 divisors (see below), whose sum is σ = 37513427720. Its totient is φ = 18756713856.

The previous prime is 28135070783. The next prime is 28135070797. The reversal of 28135070787 is 78707053182.

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

It is not a de Polignac number, because 28135070787 - 2² = 28135070783 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28135070783) 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, 4689178462 + ... + 4689178467.

It is an arithmetic number, because the mean of its divisors is an integer number (9378356930).

Almost surely, 2^28135070787 is an apocalyptic number.

28135070787 is a deficient number, since it is larger than the sum of its proper divisors (9378356933).

28135070787 is an equidigital number, since it uses as much as digits as its factorization.

28135070787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9378356932.

The product of its (nonzero) digits is 658560, while the sum is 48.

The spelling of 28135070787 in words is "twenty-eight billion, one hundred thirty-five million, seventy thousand, seven hundred eighty-seven".