1028780359 has 4 divisors (see below), whose sum is σ = 1028876904. Its totient is φ = 1028683816.

The previous prime is 1028780341. The next prime is 1028780369. The reversal of 1028780359 is 9530878201.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1028780359 - 2¹³ = 1028772167 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 (1028780339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29977 + ... + 54370.

It is an arithmetic number, because the mean of its divisors is an integer number (257219226).

Almost surely, 2^1028780359 is an apocalyptic number.

1028780359 is a deficient number, since it is larger than the sum of its proper divisors (96545).

1028780359 is an equidigital number, since it uses as much as digits as its factorization.

1028780359 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96544.

The product of its (nonzero) digits is 120960, while the sum is 43.

The square root of 1028780359 is about 32074.6061394368. The cubic root of 1028780359 is about 1009.5028625532.

The spelling of 1028780359 in words is "one billion, twenty-eight million, seven hundred eighty thousand, three hundred fifty-nine".