628787 has 2 divisors, whose sum is σ = 628788. Its totient is φ = 628786.

The previous prime is 628783. The next prime is 628799. The reversal of 628787 is 787826.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 628787 - 2² = 628783 is a prime.

It is a nialpdrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 628787.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 628787.

It is not a weakly prime, because it can be changed into another prime (628781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314393 + 314394.

It is an arithmetic number, because the mean of its divisors is an integer number (314394).

2⁶²⁸⁷⁸⁷ is an apocalyptic number.

628787 is a deficient number, since it is larger than the sum of its proper divisors (1).

628787 is an equidigital number, since it uses as much as digits as its factorization.

628787 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 37632, while the sum is 38.

The square root of 628787 is about 792.9609069809. The cubic root of 628787 is about 85.6711344969.

The spelling of 628787 in words is "six hundred twenty-eight thousand, seven hundred eighty-seven".