628819 has 2 divisors, whose sum is σ = 628820. Its totient is φ = 628818.

The previous prime is 628811. The next prime is 628841. The reversal of 628819 is 918826.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 628819 - 2³ = 628811 is a prime.

It is a super-2 number, since 2×628819² = 790826669522, which contains 22 as substring.

It is a nialpdrome in base 16.

It is not a weakly prime, because it can be changed into another prime (628811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314409 + 314410.

It is an arithmetic number, because the mean of its divisors is an integer number (314410).

2⁶²⁸⁸¹⁹ is an apocalyptic number.

628819 is a deficient number, since it is larger than the sum of its proper divisors (1).

628819 is an equidigital number, since it uses as much as digits as its factorization.

628819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6912, while the sum is 34.

The square root of 628819 is about 792.9810842637. The cubic root of 628819 is about 85.6725877870.

The spelling of 628819 in words is "six hundred twenty-eight thousand, eight hundred nineteen".