1028258761 has 4 divisors (see below), whose sum is σ = 1045115524. Its totient is φ = 1011402000.

The previous prime is 1028258743. The next prime is 1028258789. The reversal of 1028258761 is 1678528201.

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

It can be written as a sum of positive squares in 2 ways, for example, as 405257161 + 623001600 = 20131^2 + 24960^2 .

It is a cyclic number.

It is not a de Polignac number, because 1028258761 - 2²³ = 1019870153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1028258711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8428290 + ... + 8428411.

It is an arithmetic number, because the mean of its divisors is an integer number (261278881).

Almost surely, 2^1028258761 is an apocalyptic number.

It is an amenable number.

1028258761 is a deficient number, since it is larger than the sum of its proper divisors (16856763).

1028258761 is an equidigital number, since it uses as much as digits as its factorization.

1028258761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16856762.

The product of its (nonzero) digits is 53760, while the sum is 40.

The square root of 1028258761 is about 32066.4740967884. The cubic root of 1028258761 is about 1009.3322256486.

The spelling of 1028258761 in words is "one billion, twenty-eight million, two hundred fifty-eight thousand, seven hundred sixty-one".