628399 has 2 divisors, whose sum is σ = 628400. Its totient is φ = 628398.

The previous prime is 628391. The next prime is 628423. The reversal of 628399 is 993826.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 628399 - 2³ = 628391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (628391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314199 + 314200.

It is an arithmetic number, because the mean of its divisors is an integer number (314200).

2⁶²⁸³⁹⁹ is an apocalyptic number.

628399 is a deficient number, since it is larger than the sum of its proper divisors (1).

628399 is an equidigital number, since it uses as much as digits as its factorization.

628399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328, while the sum is 37.

The square root of 628399 is about 792.7162165618. The cubic root of 628399 is about 85.6535094296.

The spelling of 628399 in words is "six hundred twenty-eight thousand, three hundred ninety-nine".