1028466709 has 4 divisors (see below), whose sum is σ = 1032958060. Its totient is φ = 1023975360.

The previous prime is 1028466679. The next prime is 1028466779. The reversal of 1028466709 is 9076648201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9076648201 = 29 ⋅312987869.

It can be written as a sum of positive squares in 2 ways, for example, as 518700625 + 509766084 = 22775^2 + 22578^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1028466709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1028466779) 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, 2245332 + ... + 2245789.

It is an arithmetic number, because the mean of its divisors is an integer number (258239515).

Almost surely, 2^1028466709 is an apocalyptic number.

It is an amenable number.

1028466709 is a deficient number, since it is larger than the sum of its proper divisors (4491351).

1028466709 is an equidigital number, since it uses as much as digits as its factorization.

1028466709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4491350.

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 1028466709 is about 32069.7163847765. The cubic root of 1028466709 is about 1009.4002612049.

The spelling of 1028466709 in words is "one billion, twenty-eight million, four hundred sixty-six thousand, seven hundred nine".