28058255787 has 4 divisors (see below), whose sum is σ = 37411007720. Its totient is φ = 18705503856.

The previous prime is 28058255783. The next prime is 28058255791. The reversal of 28058255787 is 78755285082.

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

It is an interprime number because it is at equal distance from previous prime (28058255783) and next prime (28058255791).

It is not a de Polignac number, because 28058255787 - 2² = 28058255783 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28058255783) 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, 4676375962 + ... + 4676375967.

It is an arithmetic number, because the mean of its divisors is an integer number (9352751930).

Almost surely, 2^28058255787 is an apocalyptic number.

28058255787 is a deficient number, since it is larger than the sum of its proper divisors (9352751933).

28058255787 is an equidigital number, since it uses as much as digits as its factorization.

28058255787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9352751932.

The product of its (nonzero) digits is 12544000, while the sum is 57.

The spelling of 28058255787 in words is "twenty-eight billion, fifty-eight million, two hundred fifty-five thousand, seven hundred eighty-seven".