28831075787 has 4 divisors (see below), whose sum is σ = 28879208400. Its totient is φ = 28782943176.

The previous prime is 28831075781. The next prime is 28831075789. The reversal of 28831075787 is 78757013882.

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 28831075787 - 2¹⁰ = 28831074763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28831075781) 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, 24065408 + ... + 24066605.

It is an arithmetic number, because the mean of its divisors is an integer number (7219802100).

Almost surely, 2^28831075787 is an apocalyptic number.

28831075787 is a deficient number, since it is larger than the sum of its proper divisors (48132613).

28831075787 is an equidigital number, since it uses as much as digits as its factorization.

28831075787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48132612.

The product of its (nonzero) digits is 5268480, while the sum is 56.

The spelling of 28831075787 in words is "twenty-eight billion, eight hundred thirty-one million, seventy-five thousand, seven hundred eighty-seven".