628880089 has 2 divisors, whose sum is σ = 628880090. Its totient is φ = 628880088.

The previous prime is 628880039. The next prime is 628880093. The reversal of 628880089 is 980088826.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 591462400 + 37417689 = 24320^2 + 6117^2 .

It is a cyclic number.

It is not a de Polignac number, because 628880089 - 2⁹ = 628879577 is a prime.

It is not a weakly prime, because it can be changed into another prime (628880039) 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 as a sum of consecutive naturals, namely, 314440044 + 314440045.

It is an arithmetic number, because the mean of its divisors is an integer number (314440045).

Almost surely, 2^628880089 is an apocalyptic number.

It is an amenable number.

628880089 is a deficient number, since it is larger than the sum of its proper divisors (1).

628880089 is an equidigital number, since it uses as much as digits as its factorization.

628880089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 442368, while the sum is 49.

The square root of 628880089 is about 25077.4817116871. The cubic root of 628880089 is about 856.7536202639.

The spelling of 628880089 in words is "six hundred twenty-eight million, eight hundred eighty thousand, eighty-nine".