1028118787 has 4 divisors (see below), whose sum is σ = 1042202680. Its totient is φ = 1014034896.

The previous prime is 1028118781. The next prime is 1028118797. The reversal of 1028118787 is 7878118201.

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 1028118787 - 2³ = 1028118779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1028118781) 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, 7041837 + ... + 7041982.

It is an arithmetic number, because the mean of its divisors is an integer number (260550670).

Almost surely, 2^1028118787 is an apocalyptic number.

1028118787 is a deficient number, since it is larger than the sum of its proper divisors (14083893).

1028118787 is an equidigital number, since it uses as much as digits as its factorization.

1028118787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14083892.

The product of its (nonzero) digits is 50176, while the sum is 43.

The square root of 1028118787 is about 32064.2914626224. The cubic root of 1028118787 is about 1009.2864243758.

The spelling of 1028118787 in words is "one billion, twenty-eight million, one hundred eighteen thousand, seven hundred eighty-seven".