428320799 has 2 divisors, whose sum is σ = 428320800. Its totient is φ = 428320798.

The previous prime is 428320793. The next prime is 428320811. The reversal of 428320799 is 997023824.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 428320799 - 2²⁸ = 159885343 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (428320793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214160399 + 214160400.

It is an arithmetic number, because the mean of its divisors is an integer number (214160400).

Almost surely, 2^428320799 is an apocalyptic number.

428320799 is a deficient number, since it is larger than the sum of its proper divisors (1).

428320799 is an equidigital number, since it uses as much as digits as its factorization.

428320799 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 217728, while the sum is 44.

The square root of 428320799 is about 20695.9126157800. The cubic root of 428320799 is about 753.8004423961.

The spelling of 428320799 in words is "four hundred twenty-eight million, three hundred twenty thousand, seven hundred ninety-nine".