428019307 has 2 divisors, whose sum is σ = 428019308. Its totient is φ = 428019306.

The previous prime is 428019301. The next prime is 428019329. The reversal of 428019307 is 703910824.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-428019307 is a prime.

It is not a weakly prime, because it can be changed into another prime (428019301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214009653 + 214009654.

It is an arithmetic number, because the mean of its divisors is an integer number (214009654).

Almost surely, 2^428019307 is an apocalyptic number.

428019307 is a deficient number, since it is larger than the sum of its proper divisors (1).

428019307 is an equidigital number, since it uses as much as digits as its factorization.

428019307 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 428019307 is about 20688.6274798499. The cubic root of 428019307 is about 753.6235359374.

The spelling of 428019307 in words is "four hundred twenty-eight million, nineteen thousand, three hundred seven".