1028081563 has 8 divisors (see below), whose sum is σ = 1040195520. Its totient is φ = 1015998720.

The previous prime is 1028081543. The next prime is 1028081599. The reversal of 1028081563 is 3651808201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1028081563 - 2²¹ = 1025984411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1028081543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62373 + ... + 77113.

It is an arithmetic number, because the mean of its divisors is an integer number (130024440).

Almost surely, 2^1028081563 is an apocalyptic number.

1028081563 is a deficient number, since it is larger than the sum of its proper divisors (12113957).

1028081563 is an equidigital number, since it uses as much as digits as its factorization.

1028081563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15557.

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 1028081563 is about 32063.7109985728. The cubic root of 1028081563 is about 1009.2742435098.

Adding to 1028081563 its reverse (3651808201), we get a palindrome (4679889764).

The spelling of 1028081563 in words is "one billion, twenty-eight million, eighty-one thousand, five hundred sixty-three".