28788107807 has 2 divisors, whose sum is σ = 28788107808. Its totient is φ = 28788107806.

The previous prime is 28788107801. The next prime is 28788107857. The reversal of 28788107807 is 70870188782.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28788107807 - 2⁴ = 28788107791 is a prime.

It is a super-2 number, since 2×28788107807² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28788107801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14394053903 + 14394053904.

It is an arithmetic number, because the mean of its divisors is an integer number (14394053904).

Almost surely, 2^28788107807 is an apocalyptic number.

28788107807 is a deficient number, since it is larger than the sum of its proper divisors (1).

28788107807 is an equidigital number, since it uses as much as digits as its factorization.

28788107807 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2809856, while the sum is 56.

The spelling of 28788107807 in words is "twenty-eight billion, seven hundred eighty-eight million, one hundred seven thousand, eight hundred seven".