1028677889 has 2 divisors, whose sum is σ = 1028677890. Its totient is φ = 1028677888.

The previous prime is 1028677883. The next prime is 1028677907. The reversal of 1028677889 is 9887768201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1005397264 + 23280625 = 31708^2 + 4825^2 .

It is a cyclic number.

It is not a de Polignac number, because 1028677889 - 2²⁸ = 760242433 is a prime.

It is not a weakly prime, because it can be changed into another prime (1028677883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 514338944 + 514338945.

It is an arithmetic number, because the mean of its divisors is an integer number (514338945).

Almost surely, 2^1028677889 is an apocalyptic number.

It is an amenable number.

1028677889 is a deficient number, since it is larger than the sum of its proper divisors (1).

1028677889 is an equidigital number, since it uses as much as digits as its factorization.

1028677889 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2709504, while the sum is 56.

The square root of 1028677889 is about 32073.0087300833. The cubic root of 1028677889 is about 1009.4693448083.

The spelling of 1028677889 in words is "one billion, twenty-eight million, six hundred seventy-seven thousand, eight hundred eighty-nine".